My truck has one a well. What i've learned is that it's important to not send grounds to the engine block/ alternator without passing through the "ring" first. You can ground to the frame, but the frame grounds should come back up to the negative battery terminal, then through the ring, then to the block. If you pass by the ring, it can cause havoc on the system. What actually happens? I don't know. Just read "don't do it" lol.