M5 20x20 extrusion cable tie mount
thingiverse
Better images will be forthcoming. I have printed this at 0.3mm PETG with supports (easily removable due to an opening underneath the mount and fitting snugly with a 20x20 extrusion and M5 nut). Two cable tie mounting points are situated on either side of the mount, assuming wires would run perpendicular to the cable tie openings.
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