Slim cable organizer. Mount hole (chamfered) takes a single 8G 20mm screw, but can also be mounted with double sided sticky tape
With our desk we used these screws https://www.bunnings.com.au/zenith-8g-x-20mm-countersunk-rib-head-chipboard-screws-45-pack_p2420230
Also model comes with “ears” for easy printing and is designed to be printed at 0.3mm layer height (though others will work just fine too)
The author hasn't provided the model origin yet.