heres some photos of the wiring harness relocation process....the pics dont seem to be all there, but it gives you a good idea whats involved...you can either cut and solder every wire back, or you can go with the unplugging and "stuffing" method..
i did this last year with help of the same person, Daniel (ootranceformeroo), and highly suggest relocating it if u have large wheels, slammed and whatever kind of driving you do because your harness will get fucked up! S14 guys arent as fortunate as the S13 guys who can just pull over the harness and tuck it...
-take dash apart
-unplug everything
-stuff it through the hole that the wire passes through from the fenders
-route it back to the front of the car
-pass it through the engine bay
-stuff it back into the hole (you're gonna have to make the hole bigger, use tin snips or a vise grip)
-route it back to the dash board and plug everything back
-put dash back together
-use some sort of caulk or build a cover for that hole where the harness passes through
-since the harness is only so short, you will have to lay the harness on top of your driver side strut mount (don't worry cause the hood wont crush it)
here is Mark's re-routing process with the unplugging and "stuffing"
http://www.driftunit.com/photos/S14/harness/