In the sumo deadlift high pull, the weight travels from the ground to just below the chin. The lift uses the “sumo” stance, which is wider than a normal deadlift. From this stance, squat down and grip near the center of the bar, between the legs, with the hands close together. The same mechanics of the deadlift and squat apply here with weight on the heels and the back arched. Stand up, deadlifting the bar, but instead of stopping at the waist, finish the deadlift explosively and raise the elbows, lifting the bar to just below the chin. Lower the bar by reversing the movements, first straightening the arms, then bending at the hips and knees.
A common suggestion is to place the hands two thumb lengths apart (i.e. when extended towards each other, the tips of the thumbs touch). The hands should be close enough together to allow the elbows to stay almost directly above the bar when it is at the top of the lift.