It is indeed interconnect cable, (could be some weird-ass Monster Cable speaker cable. They did some bizarre stuff) but speaker ends. If you are near Northern Colorado, I’d be more than happy to help. We can use that wire, but would need to some modifying. The former owner twisted all the wires inside together and soldered a spade connector on it.
You could have bought some "spade to banana" adapters and not had to cut the spades off, but too late now.
I would suggest getting the correct wire.