I'm looking to install an amp but needed advice.I got an 02' camry and im not sure how to get past the fire wall. Is there a soft opening already there or should I just drill a new hole. if so should I drill to the left or right of the steering wheel?

 

Find a grommet that goes through the firewall. Poke something through the grommet followed by the wire.

 

now that I got my power wire ran through the firewall, by chance does anyone know on the stock 02 stereo which grey wire is the ignition? is it the solid grey or grey with stripes

 

Gray wire comes from the Radio No 2 fuse (ACC position-on at ign switch).

Not sure where the gray with stripes goes.

 

Driver side since your battery is located on the left; the shorter the run of cable equates to less resistance. I worked in a car audio store for years, we used metal hangers tied to the end of the cable to fish through the fire wall or any other obstructions.