This European DIN (BMW-style) female power socket accepts any BMW-style male plug. The self-closing lid prevents dirt and other road grime from getting inside and fouling the connections. Two end terminals accept flat spade connectors. Fits into plastic or metal surfaces up to 1/2" thick, just drill an 18 mm hole for the body of the socket to pass through, then tighten the lock nut on the other side. Hook up your wires and you're ready to go.