Simple Compartment Box for the Kids Workspace - Screwboard
You can mount 2 on the left and 2 on the right side.
You will need 2x M3 Screws (Countersunk ~10) and 2x M3 Nut for each Box to mount.
The Mounting Holes are in V1.1 integrated.
If you have the version without mounting holes, you can simple drill Ø3 bore as shown in the picture.