This is a simple adapter to connect the output PTFE tube from the Palette 2 to the Prusa Mini's input PTFE tube.
It is a remix of Aero3D's tube clip for a FlashForge printer (https://www.thingiverse.com/thing:3262559).
Supports shouldn't be needed for this print, but there will likely be a few stray strands at the top where the rubber grommet goes. I snipped them off with a flush cutter.
The author hasn't provided the model origin yet.