The IKEA Bror shelving system is super flimsy when not bolted to a wall (which is not always possible). Using it for a 3D printing enclosure is a popular choice, so we need things to secure it. One of those things is tablet stops to ensure the tablets do not lift out of place and allow the shelving unit to deform. I created a tablet stop that goes inside the post and uses the existing holes (no need to drill new ones).

You will need two M5 20mm screws and two M5 nylon nuts per corner.

I also added electronics inside of that enclosure, so one of the stops has wire clips to guide the wires along the post

I included the Autodesk Fusion file for the stop with wire clips so you can easily modify it (reshaping the clips for your wire gauge or getting rid of the clips)

Bonus: it looks pretty neat and professional.