Help How do you repair the heater controller plastic stubs?

Go to a hardware store and get a couple of full thread 10-32 brass screws and nyloc nuts. Remove all of the original broken stems from plastic disc portion. Drill and tap that disc to 10-32. It will have hardly 1.5 threads in it but that and super glue does work. Cut screw head off and install nyloc nuts.
PLEASE NOTE; the plastic stems didn't break for no reason. There has to be a issue with plenum door movement. The brass screws are not points of failure so instead the cables will wad up. Fix the fault.