The 4-wire Marinco Trolling/Charging System eliminates the need for a charge/run switch. Install the receptacle on your 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. Glass-reinforced, corrosion-resistant nylon Accepts 8-gauge stranded wire or up to 6-gauge with ring terminals 12/24V Locking Part number: 2018BR