Motion graphics call-out title effect UI

I am trying to imitate a motion graphics call-out title effect in UE4. A call out title is an element that has a dot constrained to an asset with a linear or step line out to a text box element.
Does anyone know of a related tutorial or way to create such a UI element? I know I can easily import the separate AE element and use it as a UI asset but I am not sure how to keep the line from breaking away when the dot anchor.

Here is an example of what I am trying to achieve…