I definitely see the logic in drilling holes in the mounting bracket of the Curt Adjustable Trailer Hitch Receiver - 18"-51" Wide - 2" Drop - Class III - 2" # C13701 versus the frame of your RV, however it isn't that easy. If you were to move the bracket attachment holes, then you would minimize the weight capacity and stability of the trailer hitch receiver as well as void the warranty on the hitch.
The installation would be easier for sure, but I can't recommend going this route as... view full answer...
To wire a 6-way trailer connector to your motorhome you are going to need to use a circuit tester like the handy Cordless Circuit Tester # PTW2979 and match the connector to your wires by function. The reason you need to do this is because color codes are not universal and there is no database we have access to with wiring color diagrams for specific years, makes and models of vehicles. Even if there were, the wiring could have changed from previous owners so it would be unreliable, hence... view full answer...