Cakebox question

The transparent disc at the bottom of a dvd cakebox typically has a stacking ring with a raised ridge on one side, should that face the data side of the discs or down towards the base of the spindle?

Kind of a silly question but, I’ve seen them packaged both ways.

Or should the blank be left in at all for long term storage?

I’ve never noticed. The ones I usually buy have a foam ring.