Its an Mount for the Orbitor v3 for the BLV MGN Cube. it uses:
 

4x m3x10

The 4x screws are first put in the back of the plate and then screwed in the orbiter. !ATTENTION! you need to put the belts in the plate before srewing the orbiter to the printer!

After some testing i decided to thicken the plate a bit to increase rigidety of the mount. You can use some m3 whasers to not screw in too dep to the mount. (21.02.2024) Only step file available rn.  Also use locktide and nylon lock inserts for the hex nuts to again increase regidety and a long life without needing to rescrew the toolhead. Please print it with atleast 5 perimeters and 100% infill

If you are using the metal kit for the BLV MGN Cube you should checkout @ChrisBright_1524251 model: https://www.printables.com/model/692860-smart-orbiter-3-for-blv-cube-metal-kit