Hi,
I think this is the same grommet as your picture:

(a metal 13mm bolt) but, where does it actually feed through to?
I removed the glovebox/lower shelf, part of the door trim and pulled back the carpet and soundproofing under-felt to try and find it, but it's pretty well hidden in the tangle of cables and the blower heater parts.
Also, I take it the grommet's hole is large enough for 4 gauge wire to fit through? (as you can see I used the probe of a multimeter to in the picture above, needle size goes in okay, but the slightly wider red section after that seems to be blocked by something.
Thanks,
Chief
