Musescore.com groups question

I'm having trouble understanding how a group admin can invite / allow another to add a score to a group that is configured so that only group moderators and administrators can add scores.

I'm expecting to see something in the UI that would be similar to the user invite feature, but instead of inviting users to join the group, it would invite a user to add a specific score to the group. I've looked around while viewing a specific score, and cannot figure out how to do this.

Thanks,
p