Stig: Har-dee-har-har...
Karl: You're on to something there. And you're correct. All the bloody relays are up front. Dammit.
I sat down in despair in the garage (on the newly-repaired and stench-free flooring of the platform!) and picked up the tablet to look through the PDFs of the Service Manual. I ended up somehow on the bodypanel removal pages, and I saw it.
They showed the interior of the rear body panels.
If you'll look where the green arrow is pointing, you'll see the back panel that encloses the turn signal.
This is the view in Diana, with the luggage bucket off.
I took that panel off, (two small phillips screws) and saw that there is nothing plugged into the circuit board.
That means there is a way to hook up the turn signals.
Here's a close-up of the empty plug connector:
If I can figure out exactly what kind of connector fits that plug, I can wire it to a pair of leads that have bullet connectors and plug that puppy directly into the existing harness. Wait... "bullet plug connector" you say? Why, yes! That's what the pumpkin stalk wiring uses to connect into the harness. I believe I can salvage those connectors, by soldering my leads on to those wires, and that will enable me to connect the normal turn signals!
I just need to figure out what the heck those plug connectors are, and then try to find a pair!
Any suggestions?