I am getting my feet wet in loco repair and have a 310 locomotive who's draw bar*, (at least I think that is what it is called.), has come unattached. It looks like it was mounted on two peened over posts. I could try some fancy glue or epoxy but would rather reattach it mechanically.
Three old runners the center is original. The other two had broken drawbar rests. What I did for repair was to drill into the shell and expoxy a wire into place. It works fine and doesn't look too bad.