Hello everyone,
I’m currently installing an amplifier in my Skoda Octavia 1Z3 (2008) and I need to run a 4 AWG power cable from the battery into the cabin.
I’m trying to find a suitable hole in the firewall where I can safely pass the wire through. Does anyone know:
If there is a factory rubber grommet I can use?
The exact location (driver/passenger side)?
Or if I need to drill a new hole, where would be the safest place to do it?
I would prefer to use an existing rubber grommet if possible.
If anyone has done this before, I’d really appreciate some guidance or photos.
Thanks in advance! 🙏

^^^ Left hand drive car? Just to save anyone needing to look at your location.

Yes

Check behind/near battery box. If I remember there is a large grommet feeding into car that comes in above passenger footwell. I ran a trailer relay cable through there on my old one. I pushed a length of rigid steel wire through the grommet and pulled cable back.

Alasdair