Remove the awning fabric from the awning arms and then remove the tops of the arms to access the torsion assembly.
How to repair rv awning arm.
If the rail needs to move to the right remove the right screw and pull the awning right.
Replace the cam locks and reassemble the entire awning.
Only move the awning a half inch at a time till you get it where it needs to be.
To replace the cam lock disassemble the awning assembly completely.
Next unroll the awning and slide the arms into place before adjusting the tension using the knobs on either side of the awning.