needs 2 M2x12 (or longer) screws
insertion of launchers is counter-intuitive: try it the other way around (last photo)
//Edit: as suggested by @samweiss_839166 I added another version for heat set inserts (M3x3x3) and flathead screws.
Also, I added a version with printed threads (M3).
Untested by me, I took dimensional recommendations for the inserts from CNCKitchen (4mm hole size, 1,6mm walls) and also confirmed dimensions with parts from aliexpress.
The author remixed this model.