Use of the AUX on the bargman connector

[Joe diGesu]

I have a 2014 Salem 26BHXL. I am trying to figure out what the 7th center pin is used for by Forest River. I looked in to the connection from the pig tail and see what I think is the AUX pin spliced to 2 wires, that go who knows where. I am hoping that Who can answer. The usual answer is backup lights, but there are none on the TT.

[09grizzly1]

On my trailer, the aux/back up wire was just dead ended in the junction box where the 7 wire cord ended. I added my own back up lights and wired it to the aux/back up wire through 2 relays. When plugged into my truck, the aux/back up wire is connected to the back up lights. There is a possibility the 2 wires end at tail/brake light assemblies but not used.

[Joe diGesu]

No Luck I have no stray wires. any other ideas?