When I first got my Trax 42s, they had tulip domes, and I used the wire to help put them in and to take them out. Some months later I got custom molds. My molds look very different from the pictured ones, and the receiver doesn’t clip in at all. It has to be pushed inside, and I saw the audi using the wire for some of the pushing. However, the molds have extensions, which I don’t know the name of but call whiskers, which I use instead of the wire for removing the mold. The picture provided of the Widex mold is a little blurry, but it looks to me as if there’s also a whisker on it.
For inserting, the base of my molds is wide enough for me to push on it with my index fingernail, so I don’t have to use the wire there either.
From my first months’ experience and watching the audi use the wire to push the receiver into the mold, I’d say my receiver wires and their connections at both ends are pretty tough. I’ve had my aids 17 months without a problem. Unless the Widex wire to receiver connection has some design weakness, it seems to me a wire that needed to be replaced after a month had a defect.