I picked up a heater fan resistor yesterday, it fits the plug and the fan has all three speeds now... good.
But, it dosent clip in...
Via my phone and the camera facing the screen I was able to get up behind and see what was going on. No mirror on hand, worked out so I could post the picture too.
I will need to grind it down to match what works on my heater.
I hate going to get parts without the old one in hand.
I don't know if it will be easier to take that part of the duct out and get a good precise fit or try a mocked up piece of hard board.