That would be me! So I need to look through my old photos but I might have one marking out which wire was which on the factory harness. All I did was use a multi meter to trace the circuits on the factory dash. One leg off the turn signal is ground and the other is the positive. The ground is constant and if I call terminated at a screw point (there are multiple grounds going to the same point so thats another hint).
I'm starting to work on a newer version of this dash that is 3d printed but its been a bit of a struggle as I'm not the best with CAD so the complexity of designing a dash that integrates into the car is challenging. Like I have what I want on paper but its telling the computer what I want lol