This Unreal Engine 5.4 video is about connecting the Tower Actions User Interface to the Tower that owns it.
We start by creating the Tower Actions Enum, with a typo. Next, we talk a bit about coupling, and then create an Interface as one method to reduce coupling, followed by showing a few ways to Bind to Widget Buttons. Next, we send along some Tower Action Enum values to Initialize the Widget, which are then sent to the previously created Interface when the appropriate button is clicked. Lastly, we implement the Interface in the Tower Base Blueprint.
https://dev.epicgames.com/community/learning/tutorials/33XJ/unreal-engine-14-tower-actions-interaction-let-s-make-a-tower-defense-game