Those, without a doubt, are excellent diagrams. Just be aware that last diagram is using SPDT relays. With SPST relays terminals 87 and 87a are at the same electrical point (They are internally connected) while on SPDT relays those two terminals are separate.
I had to use SPDT relays when I wired the door lock switches to use the alarm system on my Dakota. I couldn't find them at any of the auto parts stores here in Springfield, but the car audio stores carried them.