i know how to ground it... i just try to find an existing bolt so i dont have to drill a whole in the persons car.. just looks cleaner to me.. but in her car all there was is the gas tank ground and i wasnt sure if it was safe to ground the same thing as the gas tank.. but i just drilled a whole and screwed it down.. what kinda screwes or w.e do u guys use.. in my car my wires were moved alot and after a while they would come loose..do yall use any special screw or anything