No... mounted upside down, with the indented top part facing the indented top of the Provari, so it forms a V in the middle and the top of the tank becomes the same as the bottom of the Provari's small circles...
That is... take out the carto and insert it the other way, so the drip tip is coming out the flat part, not the indented part.
You had me confused at first too, nothing new there... So you're basically asking to see the size of the top of the tank, next to the top of the Provari to use it as a reference point? I think I got it now, but maybe I'm still lost.