Wire keeper

In order to weaken the spiritual morale of POWs Iraqis broadcasted trite tapes from camping place’s loudspeakers which was a real cacophony.
One of POWs joint two pieces of wires of loudspeakers together by a needle to cut off the voice and made the loudspeakers silent. When the guards arrived he pick up the needle and they didn’t get aware of it. So everyone called him “wire keeper”?.