If it made an audible difference and probably doesn't, it would still drive me nuts having the 2 ends flopping in the breeze. I would do what do what @audphile1 suggested and get the banana to spade adaptors. Also you won't need to cut up your good cables to get bare ends.
On the bi wiring subject I normally agree the differences are small except for some Usher BE 718s I had. There was a definite improvement bi-wiring. No I didn't measure anything. Could be that the combined gauge of the bi wire cables were better suited to the speakers and a single strand of that gauge would have done the same thing. no idea.