Modern electronics = Full rewire

Well I purchased my 1973 Scamp a year ago. Have a 1969 Cougar from Jersey that I purchased 18 years ago when I was 24 and didn't know anything about cars, aka bought a rust bucket that fell apart within months. It is still in pieces, kids and a Navy career killed reviving it. Finally scraped up enough money to buy a drivable car and went looking for another Cougar and ran across the Scamp. I love it. Looks awesome and drove like a dream. It isn't a speed demon but is a ton of fun to just cruise around in. I inspected the hell out of it for rust but didn't spend enough time going through the wiring. Got up last week and the battery was dead. Figured the door got left cracked open. Put in a fresh battery, walked around to the drivers seat and all the magic smoke was escaping. Several expletives later the battery was removed and the smoke cleared. Went hunting for the short and found when I unplugged the modern stereo someone had buchered the car to install the short cleared. Started taking things aparts and on top of my fire there seems there was previous wire fire that was not properly repaired. The main amp meter cable from the battery had exposed wire along its whole length, a wiper wire had no insulation left at all under the wrap but still worked. The wires in the main harness are basically one piece. So here I am becoming a Scamp wiring expert. I have drawn up a new wiring schematic in CAD but had some things I have not been able to figure out. The only things being reused are the rear harness, the interior lighting circuit, and the A/C circuit. I am going to have to fix the A/C circuit. At some point in the past something stoped working right and they wired an extra switch to turn it on but otherwise controls work and it is ice cold. I have several plugs that were already disconnected that I am figuring out what they are.

Things I have not found or have not figured out:

Radio connection - why is there a wire from the Neutral Start/Backup Lamp circuit running to it?

The accessory lamps and time delay connector - can't find it

I have put a PDF of my CAD if anyone cares to look and comment.

Going to keep working on removing the old wiring, taking awhile labeling everything as I go and figuring out what everything is and how it works. Thanks ahead of time for any advise.