[Eliot Ness]

I guess you have a couple of options. The first is to order the cable and a couple of 2mm banana plugs and swap them out.

The second is to order a couple of adapters. I did a search on "4mm to 2mm banana plug adapter" and got some hits... eBay probably has a ton but because of possible shipping delays I'd stay away from Chinese vendors.

I guess a third option is to search for "BNC to 2MM banana plug.".

I just thought of a 4th option. Change the 2mm banana female connector to the more common 4mm female connector.