whats the easiest way to get a 1/0 power wire into the interior of the car. i saw a little plastic plug to the right of he brake booster, but it doesnt seem to go under the dash that i can see.
does anyone have any trick spots to get a power wire through the firewall?

edit: 2003 r50

I ran mine through the rubber plug that the factory harness runs through. It is just to the left of the brake booster when standing in front of the car. It is much easier to access if you remove the battery and battery box.

0/1? are you running 2000RMS +? The battery is in the back for mine so I connect my 4 AWG that way. What ^ suggested seems to best way to go. Coat hanger of course.

I was going to say the same exact thing. 4AWG should be more than enough. It's also a good idea to upgrade the "Big 3"

1) Battery negative to chassis
2) Alternator to battery positive
3) Chassis to engine