BERLAT SAE Connector SAE to SAE Polarity Reverse Quick Disconnect Cable Plug Adapter for Solar Panel Battery Power Charger - 5Pack

Just what we needed to easy match polarity without moving terminals.

exactly what i needed

maintains batteries via solar

was just what i needed for my harbor freight solar kit to work with my new trailers FERRON external solar port.

If you order the long jumper cable with the plugs for quick disconnect got to have this adapter or it will blow your battery fuse