What is the procedure for putting the stud into the crank?

The manual says:

CRANKSHAFT STUD: IMPORTANT!
When installing the propeller make sure the stud is screwed-in far enough to extend past the 7/16” shoulder of the prop hub. The crankcase stud must engage the thick part of the hub in order to provide the necessary strength. If the stud is not screwed-in far enough failure can occur possibly resulting in the loss if the airframe, serious injury or death.

What is the 7/16" shoulder of the prop hub? Are they referring to the hub on the motor or spinner side?

What do they mean by the stud must engage the thick part of the hub?