What is your tow vehicle. You might consider the new 12 pin connector that Ford just came out with. Ford is using this new 12 pin connector to connect the trailer camera and trailer TPMS to the truck using a wired connection. The advantage to the 12 pin connector is that you wont get confused on which 7 pin connector to plug into which port. Just a thought.
2016 Dutchmen Voltage 3200
2017 Ford F-350 Superduty, 6.7L Powerstroke, 4x4, Crew Cab, Long Bed