I`ll leave the wiring topic to someone else here but I`m glad to take&share many detailed pictures of my working cruiser setup and hose routings etc, color coded wires in my lever, fuse box and relay details if i can figure it out by looking at the car with minimal breakdown of the fourty year old brittle parts
(d24t, 1985 740).
It would be nice to see pictures of your parts laid out, I`m sure it would help some.
What`s included in the `kit` you have (lever,spool,actuator etc all there?)?
((Your car is even older, i guess 1981? I wonder if those model years ever came with the cruiser in any country... i doubt... but the good news is that I`m sure you can build a cruiser out of parts of later years. Or maybe I`m wrong about saying there was no cruiser offered in the earliest d24 models.
Perhaps the diesel versions always had more extras than the gasoline brothers? (at least in Europe that was the case... and the diesel fuel was (and IS still) more expensive than petrol... so back then the new diesel cars had to have some extra honey to become sweet to purchase...
Nice you found a d24-specific cruiser/Tempomat.))