Confused on casting to score and leaderboard

Hey guys, I have a score which is inserted in the game, like so:

inside the score blueprint is a simple function which adds 1, like so:

I have made a new Blueprint script which contains the leader board score and Highscore:

27656-leaderboard.png

now, do I cast back to the score Blueprint in the leaderboard score to update the actual player score and save it ?

thy there no anwer??