Electrical upgrade

I've got a phone book size manual with diagrams, but it's like reading Egyptian. These diagrams are so busy, and don't really tell you which pin is which. Oh well, I'll figure that mess out when I get it all apart.

I've got most of the EZ harness figured out (I hope), but there are two wires that I'm not sure about still. They're "Backup Power" and "Left Backup". I'm guessing that they go to the backup switch on my transmission (A-833).

Along this line, how is the clutch taken into account for starting the car? Is there any protection against starting the car while in gear with this harness?