Hey H3 Builder

[f5fstop]

I'm not the H3 builder, but I do have the H3 GM service manual.
I would recommend using a plastic trim panel remover, and insert between the panel and the I/P and pry outward. From the service procedures there appears to be no screws, just press clips. One on each top corner, one on each side about 1/2 inch up from the bottom, and it appears (these procedures aren't too good) there is one on each side about half way up. (I might check this tomorrow in the shop where we have a H3 partially disassembled.)
After pulling it lose, carefully, disconnect all the electrical connectors attached to the switches such as the rear wiper switch, HVAC, etc. (number of switches will depend on your options).