Under desk drawer kit for IKEA Variera boxes

Screw the two desk holders under the tabletop and click the box holders into the IKEA box on both sides. Make sure the distance between the desk holders matches how the box holders are spaced when attached.

Note that this is not a drawer that you can pull out and leave open. If you pull it out, it will detach from the desk. This makes the design simpler and allows for quickly replacing the box, based on what you currently need at your desk.