Just bought a set of 4" Westin Driving lights to place in the lower front Grill of my 2010 SR5 and want to know if anybody knows why the directions say I have to splice in 1 wire into the parking light. Also the directions do not say which parking light wire so does anyone know which wire to connect to. What does the relay that came with the lights do and do I need it ? If not can I just connect the lights to a 2 pole switch? In other words a switch in between the hot lead wire from a power source and just take the black wire of the lights and ground the lights.