hole in Firewall

I'm trying to hookup my subwoofer in my 96 eclipse, and in order to hookup the power cable up to my battery, I need o find the hole in my firewall. I have no idea where it is, can anyone help me out?

Make one! Better yet cut a X into the steering boot and run it through there

are you sure theres no other way? I would like to refrain from drilling holes in the firewall as a last resort...

Better yet cut a X into the steering boot and run it through there

^^ Do that! Take a knife and cut a X into the rubber boot and feed the wire through it.