There are three lines listed as Do Not Use but I would love to find out what they are used for.

Odds are that at least one of them is related to security. That's the way it is on my honda.

Hey buddy, I just spent $30,000 on this piece of crap so unless you would like me to talk to your manager or better yet your area supervisor, I think you will be finding me the wiring schematics for this.

Threatening them won't help. Just get a service manual.