On the USA Gymnastics website, set MeetMaker as the registration processing company on the sanction for your meet. Reservations are only sent to MeetMaker if you do.

Once that is done, your sanction appears on your MeetMaker Alerts page and you can build the meet straight from it - the levels come across from the sanction, so you are not retyping them.

Clubs then reserve through the USA Gymnastics system as normal, and their reservations arrive in MeetMaker for them to complete and pay.

Full details, including a video, are on the USA Gymnastics Reservation System Integration page linked from Support.