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

I needed a way to adapt my wiring project so that I wouldnt confuse my positive and negative wire paths. This was the easiest way to adapt and keep the red and black wires either positive (red) or negative (black). Im not done with my wiring project, but I cant wait to finish and give it a test run...

if you buy the sae connectors you need a set of these to reverse the connection easily. Totally worth the money.

Very handy

Works great so we don’t have to swap cables. Good connection.

Simple solution to retain proper wire polarity