This a holder for mounting the OpenBuilds XYZ Touch Probe Plus on the wall or an enclosure. It has an opening for the connector/cable sticking out at the bottom.
To hold the magnetic cable end, some iron part in close proximity can be used, or something (e.g. a small washer) can be glued to the holder/mount
I printed this in PLA at 0.2mm layer hight without supports.
The author hasn't provided the model origin yet.