I am installing a pc in my car so I can do all kinds of fancy things. One of my problems is that i need to get through my fire wall. I don't want to drill a hole, is there a place where there are hole already in the wall.

 

It's easier to drill a hole ....
You can sneak it thru the boot on the steering column or remove the passenger side carpet there is a grommet way down in the footwell