Rv 6 Way Square To 7 Way Trailer Wiring Diagram. There is a standard, but so few follow them, it would be better and faster for you to use a test light to identify the wires you have on the towing vehicle, and fabricate your own. By law, trailer lighting must be connected into the tow.
The thing is I have to go to the tail lights to make attachments. There is a suitable hole with grommet on each side. Not sure which wires attach to what on your trailer connectors?
I don't think you will find a diagram on-line.
There are several different types of connectors used to supply power from a tow vehicle's electrical system to a trailer's wiring system.
Trailer plug wiring is standardized across all vehicles, no point trying to find vehicle specific info. Center pin electric brake can be switched to auxiliary. Never seen an adapter like that.