Found this harness plug on the back wall of my 25 Limited. I have all the trailer options, 14 inch screen, pano, etc. It comes from the drivers side body "corner" then is in a black plastic tube running along the back wall bottom of the cab, then ends at the black module on the back wall bottom, but there is no place to plug it in. It looks to be an weather tight type connector, but I dont see any places where it would go thru the body to the outside.