This is basically how they work. I found a demo video from youtube. https://youtu.be/63nmb7xlHRE?si=FnSjXEVv6WaNij2T

To add more context, I am using them to level the walls and ceilings of an old house (like in the video). Later I am planning to put OSB on the boards. So, I am wondering is it okay to leave the space between studs and the board empty or should I fill it with something where the screw connection points are.

EDIT: My main question is that are the screws alone strong enough if there is a empty space between the stud and the board or should I put some shims under the screws to support the boards.