I'm confused as to why the listener doesn't latch onto the output like the regular wires do. I can't really understand how to make it work.
I am sorry, we could have made this more clear. The listener latches onto the places where the wires come from at the top, but will only latch on when the wires are connected to a receiver on the bottom. Try connecting a wire to a receiver on the bottom and then dragging the listener onto the wire output (the hole where the wire comes from) along the top of the screen.