Mr. grannyring
My solution, as seen on one of my posts, was to use a short 8 AWG agent wire, between the banana plug and the thick cable.
It is also good for the strain relief on the contact point of the cable with the binding posts.
Even if I would find a banana plug that could take a 0 AWG cable, I doubt it if I would use it.
Keep in mind that it is difficult to work with a 0 AWG cable. It is very different then the ordinary 12-14 AWG cables.
Don't twist the red and black cables.