Here's my position with a similar sized object:
You'll notice that by my watch there are 'wrinkles' in my hand. They are a result of tensing the muscle in that part of my hand (try moving your pinky 'up' from the illustrated position while resisting that effort). Scott showed me that 'landamrk' saying the club should rest on the finger side of that muscle when flexed.
THe key after this point is that there be an apx 20 deg. angle between the line of your knuckles on the back of your hand and the club when your hand is maximally adducted.
Peter