Marty and team(ATC) installed the Keystone on our previous truck. They used Marinco connectors. When I sold that truck, the female Marinco connector rode away on the truck. A replacement was not readily available here in Alabama for the “new” used F-150. Wal-Mart sells a male and female connector set for electric trolling motors. It is similar to the Marinco but expensive and not up to the Marinco.
The solution here was to twist the wires together, solder them and install an outdoor electrical connector over the joined wires to prevent a short. Home Depot provided the outdoor electrical connectors. A picture is attached. Note the retainer. The connector is filled with electrical grease and the retainer holds the grease in place. Supposedly, this keeps moisture out of the connection.
While I’m out there, I think I will go see Marty in Sacrimento to buy a replacement Marinco connector. He will give me a hard time about my red neck connectors. I want to see the new ATC shop and I have the bug for a new camper too.