This bottom part of the “Drybox for Prusa Printer Enclosure V2 - without humidity sensor” does not have the hex leg on the side of it. This is the same in every way except for that. All other parts are the same. I separated the models into separate files for easier slicing.

Article for assembly instructions: https://blog.prusaprinters.org/dryboxes-and-alternative-spool-holders-not-only-for-multimaterial-upgrade/

Original design: https://www.prusaprinters.org/prints/4577-drybox-for-prusa-printer-enclosure-v2-without-humi