Yes, the info is from the wiring manual. Interpreting the signals is just a matter of following where they go. I don't know what you mean when you say you "I wish I had access to all of that." You do now. It's right up there.
The part numbers are for the connectors on the wires. There are no part numbers given for the connectors on the head unit since the head unit is a part unto itself. I'd guess that Denso / Fujitsu-Ten would have to tell you what/how to get those.