" I would prefer going in from the instrument cluster if there is no difference in access between this and coming up from the bottom."

You should try it that way and let us know how it works out. Otherwise, I'd have to try it to tell you it is possible. Sounds like a good idea, so your wrists would be working at a better angle and you could sit in the chair.

My suggestion follows the others: Find a short 3/16" flat-blade screwdriver. Push the electrical plug off of the switch. Get a dental mirror so you can see where the two screws are and what it should feel like when you go back in blind with the screwdriver. You're right, the notes I have do not offer any help to access the switch, but you can get an idea from them what the pieces look like.
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Art Benstein near Baltimore

The older I get the faster I was.