hhsbowler,
You should have your ProShop Operator fit you for that pinky hole. Some guidance would be another 3/16" lateral than your ring finger. I would recommend 0"(forward/reverse) pitch. If you have never used a pinky hole before it generally lowers your track, relieves pressure from your wrist and hand and for some a feeling of better control of the ball. If you are having wrist or hand problems you may find this to be a savior for your bowling game.