This part is used to attach a Keystone connector to a Skadis board. A cable strain relief can be done by either using cable ties or clamping the cable with the bridge part. M3 countersunk screws and these T-nuts are required to attach the part to the Skadis board (and for the bridge part, in case you use that).
No supports needed if you print it standing upright.
The author marked this model as their own original creation.