Set a pulleys to the bottom of the rack and attach D handles or Velcro strap. Stand with your left foot near the weight stack and with your right arm reach across the body and pick up the weight. With a slightly bent arm and standing tall, from your shoulder start to pull the weight.
finish with your arm pointing at 10 o'clock position. Then slowly lower back to the start.
I prefer to use the Velcro strap, as it takes the pressure of the elbow and really focuses the entire effort on the shoulder