Finished up the c/b subpanel mod. -Riveted the nutplates to the lower attach angle -Riveted the nutplates to the upper attach switch panel -Riveted the lower attach angle to the right side mid cabin cover -Cleco'd everything in place vs screwing since I'll need access to all of those panels for wiring, etc.
Nutplates are on the attach angle and the angle is riveted to the mid-cabin cover