Help with high level subwoofer connection

..just wondering why you want to use bananas....they are a convenience if you want to connect and disconnect many times... they are not the best way to connect for audiophile purposes.  Is the issue that the wires don't fit into the receiver output?...  If that's the case, put one wire into the receiver that fits... strip off some covering  before the end, and wrap the second wire's copper onto it.  Use electrical tape to finish.  You just made a Y connector.

That was the issue. It's an A/V receiver with a bunch of connections back there and I have to pull it out. So wrap the wires around each other? 

Good banana plugs work very well and lots of discerning ears like ’em, so fear not the banana! I have 2 RELs on an amp with my main speakers using bananas for the mains, spades for one sub and the second sub uses bare wires securely stuck in the bare wire hole on the same largish 5 way posts. I realize the second sub connection seems sketchy, but it all hangs together tightly and works very well. If you have only one REL (like I used to) the banana/spade combo is easy. I use AQ spades and bananas as they’re easy to simply attach with the little supplied wrench. If the receiver has spring clips and not binding posts just wrap the wire together and hope it fits.