Check Ian's post in the Archives.
Within the past two months, I an has very clearly written out what wires hook where on the 240. Bay using logic, you can figure out, then if you have everything you need.
The inability to check the archives is a primary component of people not getting an answer to a question that's been asked and answered a thousand times before.
Believe me, guys, this is a VERY common swap, and these questions HAVE been covered.
As far as wiring and WHERE it runs in the 280ZX, it's really academic. My conversion had cutting and splicing of wiring harnesses so I could give an integrated look to my harness, and if thewires were too long or too short, I took care of it. If something is too long, coil it up until you get it running, and figure out what to do with it later.
If it's too short, graft more on to get where you need it to go.