How to get a Custom Damage Event Target with Overlap Event

To put it simple I want to create a custom event similar to the any damage event but with more variables. I did something like this a few years ago succesfully but can’t seem to figure out how to get it working again. The event is always specific to one BP no matter what I try. I need some way to tell my custom event where to trigger and not always in the same place. Something like the damaged actor in apply damage but I can’t find a way to do this.

I mostly use interface and just add the interface to actors that are relevant to it. Then I have whatever is instigating call the interface to the actor. Is that similar to what you’re trying to achieve?