the best MLB woodbat sweetspot hitters vs MLB pitchers with command (experts at upsetting timing) have to keep the hands back and get the bat up to speed quickly adjusted on a plane that matches pitch location enough to optimize timing error for a solid/square/fair bat-ball collision.
Williams' SCIENCE OF HITTING is still as good a description as there is of this type of swing, but still a very limited description due to the lack of any precision model and terminology foundation as developed by Homer Kelley in TGM.
For this type of baseball hitting, to move the swing arc back, the hands are loaded to the rear side of the body, not kept in front of the body.
The swing is shortened by using the upper arms in a way that minimizes the length of the arm lever.
You must hit (not swing) using the forearms to torque the handle between the hands to quicken and time the swing. You want very strong forearms.
The rear scap/shoulder stays tight through contact to provide a platform for hitting.
The lower body is very much rear leg centric, balanced around the rear hip joint,most similar to this one-legged golfer's lower body: