WOW!! Finally took a look under my Acadia. Installed a Curt Trailer Hitch. Found the 4 wire on Driver side and located the 7 wire on passenger side. Also found a white larger connector in the center directly towards front in front of the spare and a smaller connector on passenger side to left of exhaust. Could these cause problems with being exposed and what are they for? I am going to let the dealer install trailer harness so there is no threat to the warranty.