I thought I'd publish my electrical schematics for posterity. Then if my hard drive and memory sticks all crash I'll at least have some record of what I did!
In these schematics, the "light blue" numbers (cyan, actually) are my wire numbers. The purple (pink?) text denotes which opening in the box the wire goes through. If a wire has no number that means it is an existing (pre-conversion) wire. On page 5, the wire color denotes the wire gauge.
I reserve the right to update these at any time, and make no claim as to whether they are correct. (After all, I haven't even connected my 12V accessory battery at this point!)