HUD Widget to Actor Communication

I am having issues getting a HUD widget to communicate with an actor blueprint. What I’m trying to do is have a button on screen that, when pressed will zoom in a camera in an actor blueprint. What I’m trying to do is have an event triggered in the camera blueprint to zoom it in slightly (as seen here)

however, I can’t get anything to work with triggering this event. Is there a way to cast to a blueprint from the widget, or to use an event dispatcher with this (all the tutorials I’ve found require the class to be the one that opened the widget, but in this case it was opened by a different class). Any help would be greatly appreciated