Uses the DDD system to latch into Wall Control pegboard
https://www.printables.com/model/52618-ddd-printable-wall-control-system
These are the crates:
https://www.printables.com/model/173788-customizable-stackable-beer-crate-for-all-types-of
You may need to scale down the 8mm locking pin if you decide to use it (it's not necessary). I scaled mine down to 98% for a good fit
The author remixed this model.
Removed the need for additional m4 bolts