lost

I'm redoing my nitrous set up, its a zex wet kit bottle opener heater and purge set up.. my buddy is helping me do it and we have a few questions.... what is the solenoid on the bottle used for and where dose it get its power from? and for what ever reason its a nx solenoid.... other then that...

As the title states, I bought a 2001 roush stage 3 #01-0101. Original paint and wheels, 39,500 miles clean title in hand. I bought this car "completely built" the previous owner says his build consisted of MMR Block, stock bore, mmr 900 rods, mmr forged 6bolt crank, cobra pistions, ford racing...