The goal is, to have your weak hand index finger tip touching the tip of the first bullet. Of course, on large capacity magazines, your index finger will simply lay along the forward surface of the magazine, and point towards the mag well . . . aka pointing the magazine into the mag well.
Now, back track your magazine to the mag holder. I think you will find, like most of us, you want the bullets pointing forward. In the case of mag pouches on your belt across you belly, the bullets will point to the right.