I don't really know much about pitching but I think an important aspect is that the arm isn't really dropped much but the body is tilted over a lot.
Watch this video
https://blogs.fangraphs.com/ko...ig-league-ambitions/
Arm slot is usually only really body posture.
[url=https://ibb.co/nc3kj7C][img]https://i.ibb.co/Nj1YK9S/Scree...40-Draw-On-Photo.jpg[/img][/url]
[url=https://ibb.co/2gx9Nrz][img]https://i.ibb.co/Hn6Sdyc/Scree...43-Draw-On-Photo.jpg[/img][/url]
Learn to rotate fast in a bent over posture. Think like trout hitting a low ball home run
For example I would do some med ball work in a tilted over way.