Based soley on what I've read on the forums here I don't think there is an exsisting hole you can go through, I'm sure people have found a way of course. I've read threads on installing lights and most people seem to say to look under your dash and on your firewall, find a spot that is clear and as high up as possible then drill the size hole you need. Run your wire with a rubber grommet to prevent the firewall from cutting your wire and seal the hole off, I think one user here used some JB weld? Silicone would probably do the trick to.
Make sure you run your RCA's down the opposite kick panel as the power to avoid interference
