best place to run 4 gauge?

[MindBlowin03]

I need to know the best place to run 4 gauge wire through the firewall. I recently purchased 2 12" Audiobahn Alums, and a 2150HC Audiobahn amp. Im currently lookin for a Audiobahn cap. Im sorta building the system up, them Im goin to install in March or so.

[AWDScreamenEagle]

I believe there is a hole on the driverside somewhere with a gray plug in it. I'm not sure exactly where it is but that is where you would run the wire.

[sab4you]

I ran my power wire on the passenger side - just connected to battery and on the firewall behind battery was a gromet already there - just shoved the wire through.

Ran inside side kickpanel, then under carpet right at edge near door - back under backseat side panel, then brought it in alittle, and under rear seat to trunk.