go to a local parts store and get a book, most of them have wiring diagrams in them, or you can go to barnes and noble book store and get a chiltons (they are the best), or the last place i would go is the dealer ship and order one through the parts dept.
Man, you picked a winner. That's a foreign motor for real. Seeing that it's in the SR family, you possibly can use the harness out of a 200sx SER or older B13 Se-r. Good luck!!!!!!
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You must pay to play! Boost ain't cheap! {x2 B12 Sentras with CA18DET engines}.