Hmm, good question. It has been too long to remember how it looked. The hitch cut out in the cladding comes up to the transition where the cladding covers the gas tank and then bumps out to rise up the back of the car. That should locate the hitch in the Z axis. I recall pix from Tone and others showed the position on the crossmember. Hope that helps.
BTW, did you get the backup plate so as to not crush the crossmember when tightening?
Roy