Measure the area on your trailer where you want to install the awning. It should be to the side of the door or 5 to 6 inches above the door. You want to install your awning mounts 2 to 3 inches shorter than the actual awning is wide so the sides of the awning will stick out beyond the sides of the bracket for a better hold.
Place the mount over the area where you want to install it and drill its screws into your trailer with the drill. Measure over to the next mount, making sure to keep the measuring tape in a straight line, and place the other mount on the trailer. Screw it into the trailer with the drill and screws. You can drill into the trailer at any point since the screws are short enough not to damage anything and the awning is lightweight. Also, the metal body of the trailer is strong enough to support the awning.
Slide the awing pole into the awning mounts, and horizontally tighten the mounts by turning the screw-type securing mechanism on the side with your fingers.