Glad to hear, and sure I can help, I only helped you half the way.
Now that you have the reference to the widget, you can replace every occurrence of the ‘Mouse Wheel Up’ event inside the widget blueprint with your custom event ‘IndexUP’, and it work just fine, same with the ‘Mouse Wheel Down’ event. In the player blueprint you then can forward the respective events to the correct one in the widget.
Just one more thing, try not to use the ‘Get All Actors of Class’ node, this node can gets more expensive with the number of actors in your map. If your player character is of class ‘Horror Engine’ you can cast your controlled pawn to it. If this is instead an actor component, you can get the controlled pawn, and get the component via the ‘Get Component by Class’ node, and continue with that.