Adding Hybrid Connect form into Category Description is possible.


For this you need to install a free plugin named "Widget Shortcode" http://wordpress.org/extend/plugins/widget-shortcode/ 

This plugin Outputs a widget using a simple shortcode.


Example shortcode generated by Widget Shortcode plugin :-

[widget id="hybridconnect_widget-12"]


Go to your widget area & copy the shortcode generated by Widget Shortcode.


Now you can put this Short code into category Description field.


If it doesnt work, Please feel free to contact technical support & mention this solution in your ticket.