This is a cable gland mount that replaces the Stealthburner chain mount with a facility to attach an M16 or optional M12 cable gland. I've been using this on my Voron Trident with a Huvud CAN BUS setup and has worked really well.
You can find the cable glands here: https://www.amazon.com/gp/product/B07R563FGT/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
BOM:
The author hasn't provided the model origin yet.