These are cable clips based off of a cable clips from MDPC-X, used for mounting cables onto the pc case directly.

Both can be supported with an M2 screw and nut.

Small - one cable in sleeve

Big - up to 8 cables in sleeves

Printing:

0.2 layer or bigger, I printed mine in PLA but i strongly suggest PETG (PLA in this form is prone to cracks)