I just bought a new set of Caspers battery cables (very nice BTW), anyway I went to replace the negative cable and it was grounded to my turbo, and I'm not talking about to the bracket, someone actually took a bolt out of the exhaust side of the turbo and hooked the cable to it. Anyway, as I understand it, the cable is supposed to go to a bolt on the right head, my question is this, where is the BEST place to use for a ground??