I just bought a used zex wet nitrous kit off craigslist. I just need help with a couple (not many) questions. So ok, the zex box has on 1 side intake ,regulator,and nitrous line with jet. I understand the regulator will hook up at the end of my fuel rail (I have a 97 eclipse gs) like as if i was hooking up a fmu. I kno that and the line with the jet will go into my intake after I drill a hole for it (I understand that) nw exactly where do the intake line will go (question 1)

Next, the other side of box has a black wire (ground), a red wire (positive) and a gray wire now where or what do the gray wore hook up to? (question) 2

Lastly, The guy I bought the kit from didnt even know how big of a shot or the jet size it is (he's a honda owner). How can I figure out what size jet I have. (Question 3)

2g plz help me before I blow my engine or myself up !!!

p.s. I running a stock motor bt the head and head is new and I know nt to go no bigger then a 75 shot max