Hey mate
if you tried the search button you would of found a few threds that cover what your looking for??
There are a couple on the very first page of this section!!!!
http://www.skylinesaustralia.com/forums/in...opic=105491&hl=
http://www.skylinesaustralia.com/forums/in...howtopic=105512
http://www.skylinesaustralia.com/forums/in...showtopic=71256
http://www.skylinesaustralia.com/forums/in...showtopic=98861
There are plenty of spots that you can get your amp cable through but i would suggest the panel on the right hand side of the car, that way you can run all your RCA cables and control wires down the left and wont get any interference!!!
Good luck with it
Cheers GMB