I would highly recommend you buy this book:
https://www.amazon.com/dp/1613257015/
It has detailed drawings of all the wiring and connectors. It should tell you where every wire goes.
You used to be able to view most of the book on Google Books, but they have now limited it...or may be that's just for me, since I have looked at it so much. Here's link
https://www.google.com/books/edition...0/UJdwEAAAQBAJ