So... where can I poke a 8/10/12 gauge wire through the firewall without drilling? Or a safe location to drill? I'm trying to install an Alpine CDA-7894 and it says not to hookup the 12v wire to the dash. I'm thinking of using a 10-gague like the manual says, but I can't seem to find a "safe" location to drill or poke a hole. Would prefer not to drill.

Thanks.