Here are a few more photos of the installation of the OEM Factory Surge Brake Controller
This photo is of the rear passenger side of the vehicle with all the paneling removed. The brake controller is to the immediate left of the CD changer. The black connection is part of the wiring loom which goes to the hitch. The red pig tail in the middle is from the SUV itself, and the bottom turquoise pig tail is the optional retractable tow hitch wiring. (Note: Photo credit from internet)
This photo is a close up of the brake controller unit. Note the EXTRA (third) connection block on the bottom which controls the retractable tow hitch (Note: Photo credit from internet)
This is a diagram of the installation of the brake controller unit
The following photos are more detailed factory installation instructions
Finally, here is a diagram of the Pin Out for the 7 Pin Pollack connector
