This is device mounting for a Logitech C270 on an Ender 3 S1 Pro. The webcam just slides snuggly into the holder. The angled shaft allows you to move the webcam around for the view you want. Flipping the shaft over allows for low or high positioning of the webcam.
The printer mount piece mounts in the left front corner of the Ender 3 S1 Pro by removing the 2 screws, inserting the mount into the 2 slots and putting the original screw into the holes of the mount and tightening them.
A note about the C270 webcam: since the webcam is close to the buildplate I needed to refocus the lens. It is very easy to do. Just Google with the words "C270" and "focus" and you'll get a few videos demonstration the method.

1/7/2023: Removed "Printer Mount.stl" which was a left mount only and added "Left Printer Mount.stl" and "Right Printer Mount.stl"

0.15mm

I used a raft on the shaft and a brim on the printer mount.

The camera mount was printed with the "V" slot facing up, and using supports.

The printer mount was printed with the 2 larger holes facing down (shaft hole facing horizontally), and using supports.