The 4-wire MARINCO Trolling/Charging System eliminates the need for a charge/run switch. Install the receptacle on the boat, mount the black trolling motor plug on the trolling motor, and the red charger plug on the leads of the battery charger. Simply plug in the black plug to troll, or plug in the red plug to charge.

Marinco 2018BR Marine Battery Charging and Trolling System Receptacle (4-Wire, 12/24-Volt Locking, Female)