Vectorscope and video passport

Just looking for a simple answer here, because I've read far too many different things!

Vectorscope boxes on the premiere pro vectorscope... inners ones (broadcast safe) is about 75% saturation, outer ones are 100%. The chips on the video passport equate to 50% saturation, so therefore you want to line them up with the boxes on the vectorscope when matching/correcting, but not actually reach them and fall just short?

I've seen so many different clips saying in the box, out the box etc, any help would be appreciated!