I've been observing a similar phenomenon on other guitars also can you please tell me the cause of that.Actually i don't have any information regarding to this wire.
Guitars can rattle for a number of reasons - low nut, neck too straight, neck twisted, uneven frets, hardware issues, truss rod rattling in it's slot, knackered strings
Each guitar will have it's own reasons more than likely
You'd have to give more info to get an answer that makes any usable sense, and maybe best to have a tech look at each guitar to assess what needs doing