The Screws are supposed to keep the outer edge of the Fabric from walking along the Groove in the Roller Tube. They may not even be installed on Your Awning.
DO NOT attempt to re align the actual Ends of the Awning Tube.
If the Fabric has moved along the Tube ,You will be able. To tug it one way or the other while the Awning is extended and in the lowest position.Just keep moving the fabric until everything aligns properly when it retracts. Then secure the Fabric with a Stainless Steel Screw at each end. Or just figure on making this No Tools adjustment from time to time!