Thank you for letting me know. It’s funny because it just looks like that hole in the center of the terminal would be too small to except a standard banana plug.
The Pantheon and all current Gryphon speaker terminals have no problems accepting banana plugs. If you can check my earlier post where I was testing the Ansuz D2 speaker cables, there are a couple pictures of the D2's plugged into the Pantheon's speaker terminals via its banana plugs.