Originally Posted by matticus
Bumping, hoping for an update!
After a user posted a wiring diagram on another forum I was able to locate the plug for the trailer brake controller.
It is located behind the plastic kick panel in the drivers foot well.
You remove the screw and carefully pry the tab that is holding the kick panel in place from its bracket. The plug is on the firewall/wheel well behind the wiring. It is the grey plug you can see next to the metal bracket. That wire with the finned covering was in front of it and made it hard to find.
It is the standard mopar harness plug. So the normal jeep pigtail should work with your brake controller.