--Made in TinkerCAD and Blender
--For the (cap-hole) it has a 5.5mm hole, so you can mount the cap directly to the extrusion with a M5 screw.
--For the (cable-holder-caps) you can zip-tie your cables in place.
--I added a Tnut mount to the (cable-holder-cap) so it won't fall of the extrusion and I removed the 4th extrusion notch on the second one.
The author marked this model as their own original creation.