Tekonsha 7001 Battery Switch - 4 Terminal, 12 Volt Continuous Duty, Insulated

The Tekonsha 7001 Battery Switch is a cadmium-plated isolator with terminal nuts and lock-washers. The 4 terminal switch has an insulated ground terminal for use with fiberglass or other non-conductive materials. Isolates the starting battery and provides secondary battery current for auxiliary power and full time charging of both batteries.