and please note, the picture directly below the functional description of the m904 is of a mk339 fuze used on cluster bombs(mk-20), and is designed for an air detonation of primacord in the bomb casing, which splits it open to allow the dispersal of bomblets. both the wires you point out are exactly what they're called: "wires". steel arming wire, to be precise. the ones for the 339(and the fuze itself, are installed on the bomb at the factory in nice little plastic conduits attached to the casing. wires for the m904, and the fuze itself, are installed by bomb build-up personnel, or less frequently by load crews, and comes in bulk form in rolls of several thousand feet. it's got a part number and a federal stock number. the item terminology is "steel wire"; or "arming wire" to ordnance personnel.
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from the article: Report: UN evidence counters Israel's account of Gaza war