The print is three pieces. Recommend printing in PETG, as PLA will soften on a day inside a car door. Plus, PETG has better wear resistance!
Lubricate the inside of the large piece with silicone lubricant or other generic lubricant and insert on metal stud of window regulator. Then lubricate the top of the metal stud and superglue the smaller pieces around it. This is much easier to do with the window regulator removed
The author hasn't provided the model origin yet.