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The first is a 40 series profile mount.
Specifically it mounts to the side of a 160mm x 40mm profile like a SimLab P1.
https://www.printables.com/model/253955-g-belt-controller-40-series-profile-mount
The second is a cable support. I created this in anticipation of a full chassis mover.
https://www.printables.com/model/253951-simxperience-g-belt-cable-supportrelief
Well done. Thanks for sharing!.