This was easy because it's all a straight shot across all the lit surface. Except the numbers, but that had a big plastic thing I could put LEDs over. Everyone says that these hvac units are near impossible ta take apart, blah blah. It really wasn't that bad... Just went slow and made sure I remembered how all the plastic bits came apart.
I still have to solder the power wires from the LEDs into the lighting circuit, it was just a loop off the connector so no way at all to tell which side is pos and which is neg on the PCB. I'll have to put a meter on it in car, then take it back out and solder.