Also to note that the horizontal twist lock connection on the rig puts a nasty strain on the wires in that plug.
A good investment is a 90 degree dog bone.
https://www.amazon.com/Marinco-ParkP...75&sr=8-4&th=1
A bit expensive but well worth it in the long run. You may have to rotate the receptacle on the camper, but that's a 5 minute job.