http://matthewbotos.com/maxima/wiring.html
Found it. The pic is not real good but there is NO DRILLING required. Take the plastic wheel well cover loose, I don't think I took mine off completely. You will probably need a fish tape or at least a wire coat hanger to fish it through. It is easily the best way to get it through the wall. Something long and sharp ( think I attached a razor blade to a screwdriver to reach up into the grommet that has NO WIRES in it and poke a decent size hole for your cable. It took me longer to find something to poke a hole then it did to get the wire through to the other side. You can do it!
Just a side note: I used a Scosche wiring kit (I know Wal-mart special) that came with a 100A fuse which I pull anytime I need to work on my car stereo. It is very convenient as opposed to removing the wire from the battery terminals.