Hiya folks, Nice and easy this one... How can I get a cable from the engine bay through to the cabin? I've looked everywhere and can't find a way through the firewall... Need to give my amp some power! Found this thread http://www.audi-sport.net/xf/threads/front-fog-lights-retrofit-audi-a3-8v-2015-us.255379/ but can't seem to find said grommet... Cheers all!