I have 2 wires running to a plug that are wrapped around the cable that leads to the EFI control box. I saw it today and have no idea what it's for or if it's even needed on my Z. FYI, mine is not a turbo (which this may be a connection for those who do have turbo), 5 speed, that I'm trying to restore. I would appreciate anyone that might be of assistance on this matter.

Haven't ya got any real problems to solve on your Z?

If curiosity is gonna kill your pu***, err, cat, then I'd get out the Factory Service Manual (FSM), see which pins those wires lead to, and trace it back.

Here's a manual (pdf) for a '78, better than nothing as a starting point.

http://www.xenons30.com/files/FSM/1978%20280z%20FSM.zip

Thanks for a irrelevant link. It was a simple question, I expected a simple answer, but I suppose that's too much to ask. Oh and yes I have a TON of real problems with this restoration, but I guess you knew that also.

Try this link for 280ZX info: http://xenons130.com/reference.html.

Without the wire colors, it's difficult to guess what the wires could be for.