Print two of these, attach to a DIN mount using M2 self-trapping screws.  Then, attach the Mini-Rambo v1.3a board from your MK2 using M3 screws.

This allows you to easily add a left over board you're no longer using from an MK2 to your Voron/Klipper printer as another MCU- a great way to control more fans and motors.