To mount this, you'll require the following hardware:

• Attachment to ToughBuilt box siderail:
  • 8x M5 T-slots
    • AliExpress link
    • Amazon link
    • TEMU link
  • 8x M5x16 bolts with an alley key head
• 3D-print to folding shelf
  • 12x M4x8mm threaded inserts

  • 12x M4x8mm bolts with rounded head

     

  • 2x folding shelves 20cm

    

In case you'd like to use any other set of folding brackets; I've added the STEP-file as well so that it is easier to change the mounting holes.

And lastly, screw a flat piece of wood to your liking or availability to the folding brackets and you have yourself a side table!