I use these 7-way covers on my work trailers. I add a dab of dielectric grease from time to time to help keep moisture out during extended storage periods. I like the notch to secure to the cable while towing.
Just a thought on electrolysis... the 7-way is connected to the + and - of the batteries correct? Sitting in water in pin box could be source of electrolysis. My $0.02 for today.
Morryde Safe-T-rail install issues
Today, 12:55 AM in Mods and DIY