Thanks to Defiant@GOM-TEAM for all of the information!
Update as of 5/23/20: Major thanks to Stevo for making me a new pic describing how to reposition the driver since GOM went down, which removed my pics!
Sometimes, you might download a mod that messes up the driver’s head like in the picture below: (Thanks Zerp!)
To fix it, go into the car’s data directory/scripts. When there, open up the main car .cfg.
Major thanks to Stevo on GOM for the following picture!
Find the area in the .cfg that looks like the picture below.
Follow the picture to find what needs edited to move the driver’s (Mitch) body.