Yes, we have had several of those wires underneath the Atlas O switches fail on our club layout. We installed most of these switches circa 2002 when Atlas was using thin wires (they use thicker wires or bus bars on their switches now). Our normal solution is to solder a short wire from the center rail on the connecting track to the switch rail. However, the center rail on the switch is made of some alien metal that will not hold solder. So what I have had to do was to drill a small hole through the bottom of the center rail on the switch and feed a copper wire through it. Then I fill the hole with solder the best I can to secure it and solder the other end of the wire to the connecting track.