Tonight I partially mounted the flap switch console. First, I engineered how it will be mounted. (It was a little challenging because there's no access to the left or forward sides of the console. I briefly thought about mounting an attach-angle to the fuselage skin, but I figured out a way to do it without drilling any holes in the skin.)
I made two angle pieces for the bottom of it, left and right. One will be riveted to the throttle quadrant, and the other will be riveted to the sloped console itself. Then, screws/nutplates will actually attach it to the throttle quadrant. There was a lot of head-scratching and improvising tonight, because I couldn't put clecoes on the quadrant/console assembly while it was in place in the airplane. I used some tape and creative placement of clecoes.
The outboard attach screw will be a challenge to get to, if I ever need to replace the flap switch, but it'll be do-able with a flashlight, mirror, and a flexible extension bit. It's outboard and forward of the control cable anchor -- not an easy place to get to, but I think it's better than mounting a screw though the skin.