Attach the awning railing to the roof of your rv using the screws bolts washers etc.
How to repair rv awning arm.
If the rail needs to move to the right remove the right screw and pull the awning right.
That came with your awning and making sure not to strip the screws.
If the upper arm rail needs to move to the left you want to remove the left screw and pull the awning in the track to the left.
Replace the cam locks and reassemble the entire awning.
To replace the cam lock disassemble the awning assembly completely.