I started fitting the two flap microswitches to the fuselage, and attached the striker plate to the flap arm. After testing various locations for the components, I decided to flip the switch attach-angle upside down so the switches are closer to the fuselage skin. I did this so the fast-on tabs on the switches are UP (away from the seat belt attach point and the flap tube). This position also gives the striker plate a more elegant approach as it presses the switch arms.

I replaced a non-standard Adel clamp (the one that had been temporarily holding the wire tube to the flap shaft) with a new one.

I drilled and bolted the switch attach angle to the bulkhead with two AN3 bolts, washers and nuts, the removed the angles and the striker plate. I trimmed off about 1/4" of the width of the striker plate that won't be needed, then I deburred and primed both parts.