Hey, so...I think I might know what your talking about. And yes, if I'm thinking the same wire, it is a ground. If you feel about half and inch or so below the valve cover, near the back (but not on the back of the cover) there is a screw (10mm) I believe that has a grounding loop. There are suppose to be 2 wires that go to it. Might check and make sure that both wires are on it, if not...then that's probably where it goes. Hope this helps, pics would be nice to verify