To install the connector on the trailer I bought a plastic square cover for an electrical box. It was grey so I painted it white after I drilled a centre hole to fit the new connector. On the plug I lubricated with WD40 to assemble the tight fitting yellow sleeve. The electrical box cover came with a gasket. I still added white caulking to the assembly on the trailer. No more possible for mice to crawl into trailer where the cable inlet was.