I am replacing the wiring harness in my Mk I. I have the tach out. I have the tach ignition wire holder, but I am told there is supposed to be a flat copper square loop that the tach wire is supposed to wrap around with the wire holder. I think I am missing this piece, which I think pushes into the back of the tach (if this makes any darn sense....). Does anyone have a close up photo of the back of their tach that shows the the holder and associated pieces, as well as the wire loop direction? Thanks.