Can you put details to your story?
That will be helpful.
On the other hand, you've already connected one banana, but I'm still trying to understand what's wrong with the other banana and how it's not same?
How do I put new banana connector on with other wires showing up after cutting ?
How do I put new banana connector on with other extra wires and a middle shielded one showing up after cutting off the old 2 prong one ?
https://www.flickr.com/photos/panasonic_danny/53173900759/in/datetaken/
Thanks