How to trigger an event by having two specific meshes collide?

I want to have a sequence play when a specific mesh comes into contact with another mesh. I have a ball with physics active and when it rolls into a wall, I want that wall to bounce back and hit it, but I don’t want the sequence to be triggered when my character hits it. Just when the ball does.

Is your Wall BP? Then Check in your Ball overlap the otherActor with a Cast to your ballBP, If sucessfull call the bounce Back function on the Wall mesh ( or Check in Wall If otherActor ist Ball…)
If No BP, Just give the Walls a Tag and Check for that Tag in overlap