ok so i have searched, and spent about 40 mins locating a grommet,
I removed scuttle panel,
and where the pollen filter is behind is a black grommet,
however on the inside with the glovebox dropped there is no sign of the grommet or any cable i pushed through.
people have mentioned seeing the grommet the other side are guys sure ??????, As there is no grommet, as the fusebox etc is a fair way back from thef firewall.
I also can't see how you would drill the firewall into glovebox area ?, did you remove sound deadening to do this ? or the fusebox ????