If your that worried run the ground back to the battery. I wouldn't suggest making your ground connection on the outside of the vehicle if you go off-roading because it's going to be exposed...im not dead set on it i was just wondering if you knew how to go to the frame or if the seat bolt will work? i have been told many times seat bolts are a bad place but there are 8 bolts near my amp, 4 on the driver seat and 4 on the passenger seat. no other bolts within a 3 foot area. so is that good enough or should i just go to the frame and get a rubber grommet?