Did you ever figure this out? I'm in the middle of doing the exact same thing and have the exact same question..
OEM trailer harness install
I am in the process to adding a hitch to our Atlas SE. I purchased a used control module 5Q0907383L and a new Trailer Tow Harness 3CN971124B. I was able to connect the harness to the control module but the second connection, i can't seem to figure out where it plugs into. I picture the second connection in question, any help would be greatly appreciated.
