On your Ender 3/Pro
This easily clips to the shroud with the QR code on it.
Holds your PI Camera or clone using the holder found here https://www.thingiverse.com/thing:3407867 or https://www.thingiverse.com/thing:2994762 or just about any other holder that holds a PI camera.
I don't even use a screw on mine because it pushes into the holder nicely.
It's just a quick and rough Tinkercad remix of https://www.thingiverse.com/thing:3512690 that I created because I wanted my camera to be about 8 inches out instead of up close.
Check out the pics and camera view screenshot from Printoid.