Bananas over ARC VT-100

Do the jacks have plugs in them, are they the wrong spacing or are they just not designed for bananas?

I have the mk II so the connectors may be different. Mine
has these huge binding posts that will take either spade or bananas. You put the bananas in by inserting the banana plug into opening on the back of the binding post. Have you tried screwing/unscrewing the binding post to enlarge the opening? I have used several banana cables with these and never had a problem. They don't appear to be smaller than any other banana posts.

I know that WBT makes some adapters. You might try cardas too.
Other alternatives:
(1) If you do not have the same adapters, you might want to give audio research a ring and see if they will sell you upgrade/larger binding posts.

(2) You can always sell your cables and replace them with some used spade cables.

There is a hole in the binding post but it's awfully tight. Trying to cram a banana end into it is near impossible. They almost look like they'd take a smaller version of a banana end, like a plantain banana. I think I'm going to break it if I push any harder.

Loosening the binding screw does nothing.

I called ARC but they can't help me till Monday.

Sell the cables? You'd have to pry them from my cold dead fingers first.

Thanks for the comments so far. Keep them coming