Slides and locks in place.
Attach this adapter to whatever you want, with 3 options provided:
Additionally, add a M4 threaded hole, 7mm away from top center of this piece (to your base attachment), and push a screw through, lining up with the (un)threaded hole present in the terminal, which act as a mount lock of sorts (see picture)
The author marked this model as their own original creation.