Use the handle attachment and lower it to the lowest level on the machine
Grab the handle start with your arm slightly adducted (crossed in front of you)
Raise your arm out laterally until your arm is roughly parallel to the height of your shoulder. Keep your elbow slightly bent.
Let the weight pull your arm into slight adduction, just as you started and repeat the movement
Tips:
Think about the handle being a paintbrush and you are painting the wall to the side of you.
This is training your lateral deltoid muscle, which is a small muscle. Keep the weight low so the bigger muscles in the chest and back do not take over the movement.