how do you wire the brake switch

I'm thinking that you have to run that orange "Brake Switch Power" wire to the brake switch. From there the white "Brake Switch" wire goes back to the fuse panel where it just loops to the column set. There it ties into the white wire on the turn signal harness.

Where the orange "Third Brake" joins in, I don't think it's required. I think it's just there if you have a brake light in your spoiler/rear window.