We've had issues with the connectors coming off/breaking off the encoders and the breakout for them just being exposed so have created these 3d printed accessories to go with them. The holes on the side of the encoder cover are meant to be tapped for 10-32 set screws.
Using a taz 5:
-encoder cover required no finishing, just tap the holes and good to go
-the breakout board snap cover required a little finishing with a knife or file where it oozed to properly seat in the lower section but very minimal