How to manually insert Video Associations through Scorecard

I recently got a scorecard and uploaded a trailer for 'Himinlifandi' (https://www.imdb.com/title/tt15558660/?ref_=ttmi_tt). The video Associations tag only tags one of the cast members. I can't find a way to change it. I've searched the help and the forums here, but surely there must be a way?

I'd like to Include the whole cast and essential crew in the Associations.