This is a remix of the Sofle V2 RGB Beveled case created by thysdewet on thingiverse:
https://www.thingiverse.com/thing:4753682/files
It is intended to use M3 Socket Cap screws (3 per side) to attach the mount to the modded Sofle Case. It then will attach to the Modded Ploopy Nano that that created here: https://www.printables.com/model/284971-norne-ploopy-crkbd
The author hasn't provided the model origin yet.