I have about four of these on my benches. Convenient, but I wanted to maximize space. I did not see that anyone ever made some of these for the Kobalt boxes, so I modeled up my own in Fusion. So far they work great. The extra bump inside the bracket was to make sure that the box had enough to sit on while accounting for the spacing of the honeycomb panels.
To print: Lay the honeycomb pattern face to the bed and turn on supports (normal, snug) for the pegs. I also recommend a 8mm brim on the outside only with a gap of 0.1 mm to prevent lifting. I used 10% Gyroid infill with 3 walls.
Left and right brackets will consume about 128.53g of PLA and it took 3h32m to print on my BambuLab X1C at standard speed.
The author marked this model as their own original creation.