Hello all. I had recently gotten my 2008 V6 back from the shop after getting the timing chains replaced and while replacing my catalytic converters, I noticed a ground wire hanging down from the firewall. I did some searching and people are saying that it goes to the back of the head. Trouble is, there seems to be a ground wire already attached to the driver side head. So my question is, do both wires attach to the same head or is the wiring out of place?