The more you can move his left knee toward his left foot, sort of Ben Hogan-style, the better. The second part of this weight shift is rotation. Once you make this move with the left knee, the rotation of the torso is what carries all of the weight to the right. From there, the left knee straightens and the hips begin go rotate to an open position. That is what gets the remainder of the weight shift to occur.
Right hip is turned, and the right knee is in.
Momentum will carry you through to the finish.