The general idea would be to create a Node there, consisting of an Ellipse, with which that dashed-line Link would connect. One possibility is for each Link to have a Label Node. Another possibility is for that Ellipse Node to be independent of those two Links.
So the question is: what should happen when those two solid Links get re-routed? What should happen when one or both of them are deleted? How many other such “gatherings” of Links might there be involving one or more of the same Links?