Join Date: Feb 2007
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Might be a grommet behind the glove box (you have to remove the internal liner).
That is what i was going to suggest. If you look under the dash on the bulkhead, you might need to pull the carpet back a bit, you should see quite a few rubber grommits on it. When I wired an amp and sub into my old car I just slit the grommit and pushed the wire through it, job done. You can always add a little bit of silicone to re-seal it if you want to be sure of no leaks.
Currently in Mike11's garage:
An LPG powered Ford Focus ST170.