NOS Install - need help

Hey guys - first post over here, also a member on Yellow Mustang Registry. I just finished installing a wet Nos Sniper Kit for the 4.6l. I have everything installed with the exception of the arming toggle switch. I am very well oriented under the hood, but when it comes to the interior electrical system I am totally clueless!. How do I get wires from the engine bay to the interior( I ran my nitrous lines out the bottom of the hole in the spare wheel well, cable tied to the fuel lines, and up into the engine bay through right fenderwell). Besides being scared ****less of trying out the nitrous system, I'm in desperate need to find a way into and out of the engine bay from the cars interior ( need to hook up to a 12 volt powersource and also connect the lead to the throttle sensor). Guys, any help will be tremendously appreciated.

Ok, I will try in the morning. Do any of the trim/dash panels need to be removed? The main thing that I think would be getting in the way is the trim panel that meets with the door - the piece that has the hood release lever. should this be removed? The wire is very thin, enough to supply power to the LED light on the arming switch and it will be joining up with a prong on the the "wide open throttle sensor" that was mounted on the TB.

Thanks for the help yall.

Issue resolved - NOS working very well!

Spent today installing a NOS wet/fogger kit on my 03 GT. I have already upgraded my intake manifold to the aluminum Typhoon intake manifold from Professional Products. I hit the street tonight(the benefits of working wednesday to saturday ) with a conservative 75 shot and 2 full 10lb tanks. I haven't installed a purge solenoid yet, so I activated the NOS and when I went wide open throttle at 40mph in 2nd gear I didn't notice a different..........for about a second until the lines cleared of the liquid nitro and the gas started pumping. I went from 40-70 in a blink. Once I had the lines cleared of the liquid NOS(it pools into liquid after a few minutes of being in the line due to the heat from underneath the car) and had the gas flowing, I did a 40-100mph test. Unreal. My car was putting down 289 rwhp and 312 rwtq before the NOS. The different NOW is very real. Tomorrow I will try the 125 jets.