I would probably use a Scene or Box component in your character Blueprint. In Components tab, you can position component in front of character. I suggested using a Scene or Arrow component, but any component that is set to not show up in level should be fine. What you’re really using component for is its location, which you can reference in Blueprints.
So in your Player Controller (or Character, wherever your character controls are), you can get location of component in character you wish to pass ball to. If you’re more descriptive of how you’re moving ball between players, I can help you get this set up if you need help.