diff --git a/src/wireviz/DataClasses.py b/src/wireviz/DataClasses.py
index 87dfe6cd..6aa9e662 100644
--- a/src/wireviz/DataClasses.py
+++ b/src/wireviz/DataClasses.py
@@ -1,7 +1,7 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 
-from typing import Optional, List, Tuple, Union
+from typing import Optional, List, Dict, Tuple, Union
 from dataclasses import dataclass, field, InitVar
 from pathlib import Path
 
@@ -94,6 +94,7 @@ class Connector:
     type: Optional[MultilineHypertext] = None
     subtype: Optional[MultilineHypertext] = None
     pincount: Optional[int] = None
+    additional_parameters: Optional[Dict] = None
     image: Optional[Image] = None
     notes: Optional[MultilineHypertext] = None
     pinlabels: List[Pin] = field(default_factory=list)
@@ -182,6 +183,7 @@ class Cable:
     color: Optional[Color] = None
     wirecount: Optional[int] = None
     shield: Union[bool, Color] = False
+    additional_parameters: Optional[Dict] = None
     image: Optional[Image] = None
     notes: Optional[MultilineHypertext] = None
     colors: List[Colors] = field(default_factory=list)
diff --git a/src/wireviz/Harness.py b/src/wireviz/Harness.py
index 14f96b06..486dfdd9 100644
--- a/src/wireviz/Harness.py
+++ b/src/wireviz/Harness.py
@@ -12,7 +12,7 @@
 from wireviz.DataClasses import Connector, Cable
 from wireviz.wv_colors import get_color_hex
 from wireviz.wv_gv_html import nested_html_table, html_colorbar, html_image, \
-    html_caption, remove_links, html_line_breaks, bom_bubble
+    html_caption, remove_links, html_line_breaks, bom_bubble, nested_html_table_dict
 from wireviz.wv_bom import manufacturer_info_field, \
     get_additional_component_table, bom_list, generate_bom
 from wireviz.wv_html import generate_html_output
@@ -122,11 +122,13 @@ def create_graph(self) -> Graph:
                      connector.color, html_colorbar(connector.color)],
                     [f'P/N: {remove_links(connector.pn)}' if connector.pn else None,
                      html_line_breaks(manufacturer_info_field(connector.manufacturer, connector.mpn))] if self.show_part_numbers else None,
+                    nested_html_table_dict(connector.additional_parameters),
                     '<!-- connector table -->' if connector.style != 'simple' else None,
                     [html_image(connector.image)],
                     [html_caption(connector.image)]]
             rows.append(get_additional_component_table(self, connector))
             rows.append([html_line_breaks(connector.notes)])
+
             html.extend(nested_html_table(rows))
 
             if connector.style != 'simple':
@@ -208,6 +210,7 @@ def create_graph(self) -> Graph:
                      html_line_breaks(manufacturer_info_field(
                         cable.manufacturer if not isinstance(cable.manufacturer, list) else None,
                         cable.mpn if not isinstance(cable.mpn, list) else None))],
+                    nested_html_table_dict(cable.additional_parameters),
                     '<!-- wire table -->',
                     [html_image(cable.image)],
                     [html_caption(cable.image)]]
diff --git a/src/wireviz/wv_gv_html.py b/src/wireviz/wv_gv_html.py
index 87b24962..a54f0020 100644
--- a/src/wireviz/wv_gv_html.py
+++ b/src/wireviz/wv_gv_html.py
@@ -1,12 +1,25 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
-from typing import List, Union
+from typing import List, Dict, Union
 import re
 
 from wireviz.wv_colors import translate_color
 from wireviz.wv_helper import remove_links
 
+def nested_html_table_dict(rows):
+    if isinstance(rows, Dict):
+        html = []
+        html.append('<table border="0" cellspacing="0" cellpadding="3" cellborder="1">')
+        for (key, value) in rows.items():
+            html.append(f'   <tr><td align="left" balign="left">{key}</td>')
+            html.append(f'   <td align="left" balign="left">{value}</td></tr>')
+        html.append('  </table>')
+        out = '\n'.join(html)
+    else:
+        out = None
+    return out
+
 def nested_html_table(rows):
     # input: list, each item may be scalar or list
     # output: a parent table with one child table per parent item that is list, and one cell per parent item that is scalar