ok so i got my lights for under my dash, i have all my wires, relays, butt connectors i just have 2 questions befor i install them. ok mayb three, first, how do i get to the door pin switch? im sure i can figure it out, just thought i would ask befor i start, second if i connect them to one of the pin switches wil tehy turn on when both doors open or do i have to connect to both of them (im using a relay). third is is it ok to connect 18awg to the battery, any other suggestions?