Presumably the wires are connected to the speakers, and it's the "power" end that not connected to anything. I am assuming that the wires are grouped in pairs (one red/one black).

New sound-over-powerline tech might let you position your passive speakers anywhere you can find a power outlet -- no speaker cables needed.The Latest Tech News, Delivered to Your Inbox ...

Imagine being able to place your existing wired speakers anywhere you have a power outlet, instead of running speaker cable through walls, or under carpets. That’s the promise of Audio Cu, a ...

Imagine being able to place your existing wired speakers anywhere you have a power outlet, instead of running speaker cable through walls, or under carpets. That’s the promise of Audio Cu, a ...