Trying to add ratings to my films

Hello! I need help adding the correct ratings to my films. The ratings that I want are real ratings that were set on the films but were never added to IMDb. https://www.imdb.com/title/tt35361125/?ref_=nm_flmg_job_1_unrel_t_3 (Freddy’s: The Film) (Rating is R) https://www.imdb.com/title/tt35977310/?ref_=nm_flmg_job_1_unrel_t_5 (No Escape) (Rating is R) https://www.imdb.com/title/tt35932675/?ref_=nm_flmg_job_1_cdt_t_2 (Center of Everything) (Rating is PG-13) https://www.imdb.com/title/tt34930822/?ref_=nm_flmg_job_1_cdt_t_17 (The Zombie Apocalypse) (Rating is PG-13) https://www.imdb.com/title/tt34932436/?ref_=nm_flmg_job_1_cdt_t_16 (Backrooms: The Movie) (Rating is R)