Cable chain/Drag chain mount for NEMA17 motors for stuff like MPCNC. I found good chain, but I wanted to mount chain to motors directly, so here's my solution. Two parts which clamp together with two M4 screws (DON'T OVERTIGHT!). Remember to use supports when printing for tabs that grab motor end plates! On Prusa I'd highly recommend to use support enforcers. Support has two M3 screw holes to fix Cable Chain end piece.
PETG Print Gcode added for Prusa MK3S users if one doesn't know how to make supports.
Cable Chain used in picture (not designed by me) can be found here. Works absolutely superior compared to anything else I've found and Teaching Tech YT channel used this too.
https://www.thingiverse.com/thing:611593
The author hasn't provided the model origin yet.