I hate to be that guy with "extra parts" but does anybody know where in the plans this black case goes? I completed the empennage kit and find no mention of this in the electric trim installation. Thanks!
This is a D-sub connector shell. In my 2020 build, the trim servo D-sub connector did not use the shell. Rather all openings on the wire insertion side of the servo's D-Sub were sealed using RTV. You now officially have an extra part for your plane
The backshell is to be used at the other end of the trim motor wire harness when it is connected to the back of the AV-60000 Power Module in KAI 42M. Tape it to the coil of trim motor wire in the tailcone so you can find it when you need it (much) later. You're welcome.