Comes with a 1.5m long power lead with Battery Circles and Blade Connectors. Attach the power lead to your battery, Red to (+) and Black to (-). Next, attach the corresponding wires to the back of the socket as marked on the back of the socket. The socket will handle 12V/120W.
NOTE: Before drilling any holes, ensure there is enough space behind the installation point to accommodate the body of the socket.