Different types that I quickly made and used to attach the belt.
(this is what I used to install the new belt for the new Y tensioner that bring back full Y printable area)
print at 0.2mm layer height or smaller, I would recommend 0.10~0.16
With and without heat inserts, and some without screws that just loop to secure.
screw model are M3x6 or M3x8
STEP file in the zip