Event from level blue print to actor

(apparently new users can only post one image at a time, so I’m splitting in two parts)
and I think it’s not the set up I am looking for.
If I could diagram what I am looking to do it would be something like this image below.
this way I can have 1 or 100 interactiveBall actors and would not need to change anything, right? if I am not mistaken with the suggestion above I would need to reference and bind the event on every new interactiveBall, correct?