It's a simple cable guide to protect the cable from the FINDA. I'd recommend printing the bigger part in the same orientation as I did in the picture, with supports only touching the buildplate. Layer height 0.15, for better overhangs.
You'll need:
4x M3 nuts
4x M3x12
1x zip tie, same size as Prusa used for cable management
Tighten the screws carefully so you don't break it!
The author hasn't provided the model origin yet.