Buyers Products 2-Way Die-Cast Zinc Trailer Connector from is a round terminal slot, trailer-side connector. It attaches to an existing trailer wiring lead and is commonly used to make a power connection between the vehicle and a trailer-mounted winch or electric tarp. It features durable, die-cast zinc construction with a "spring style" cable guard to help protect your wiring. Round terminal slots are configured in a horizontal or vertical pattern.