Occy 2 Bulkhead Wiring Route / Quadlock Extender

Hi All,

I'm dropping in a 4 Channel Amp into my occy 2 and was wondering if anyone knew a good place to route the power cable to the battery through the bulkhead / firewall. I 'think' there might be a grommet around the passenger side behind the airbag somewhere, but this is by feel alone!

Also, I need to be able to tap into my existing speaker wires at the back of the radio and would ideally like a way to extend the loom without chopping the OEM one. Any idea if i can get a wiring extension?

Thanks!