Summary

Thingiverse decided to delete that clamp, which is made from ground up to proove that https://www.thingiverse.com/thing:2403756 this design is a poor example of how capabilities of 3d printers.

I used to have nice description and pictures and all that but thingiverse decided they are braindead and instead of fixing issues currently present on the website they want to destroy it even more so they removed that clamp from the site.

Print with supports and one of the parts you need to turn 180 so it lays properly on a buildplate.

Prints in 2 parts and then you just join it together.