yes, they are a one time thing, but the good news is they are cheap and easy to replace. Most of the vendors have them, I got one from Jim Carter, and I made another one. It will become apparent what to solder when you do it. However I soldered the other end from what that drawing suggests, as that is how the one I took out was done. It is also apparent it will work both ways. The one I got from Jim Carter was already soldered.
