I'm following ya - so if someone was to make a plastic skull cap, with pre-formed square peg slots in it...

And they sold pairs of corresponding plastic pegs...

You could saw off your antlers, then glue the plastic pegs at the bases, then just plug them right into the slots that are built-in to the mount, right?

Would work for sheds - old racks - etc... But, the downside would be that you'd have to cut them off of the skull cap forever.