This is just a remix of the original model. This cover is designed for Raspberry Pi 4B and 3.5 '' WaveShare display (rev. 2.0). The RPi4B is powered via USB-C at the bottom. Download the remaining parts (brackets ...) from the original model:
https://www.prusaprinters.org/cs/prints/18078-octo-prusa-mk3s
The author remixed this model.