This is a toolbox, remixed from https://www.thingiverse.com/thing:3544468 to fit the MK2S with Bear upgrade (shortened by 1cm)
Quote from original model summary :
Prusa Bear toolbox (bear? here: https://github.com/gregsaun/prusa_i3_bear_upgrade) . Works with 20mm V-slots, doesn't really make use of the V-slot interface but has a snug fit. See pictures.
For the other side mirror in your slicer. And use supports to print!
To mount: backside first then tilt the front down
To unmount: pull front side up, backside will follow
Don't forget to check orientation before printing and mirror it if you need both/other side.