Seat mounting 1966 N15CS

Could someone post some photos of the bottom of the seat pan and the frame area where it would attach?

I have a N15CS that needs some improvement, it was semi restored when I bought it
I am pretty sure the seat is mounted incorrectly; there are 2 bolts at the back that go through the rear fender

Thanks

Besides the ones I sent you from my client's bike, here are two others:





Two different N15s, BOTH show the single rear bolt. Maybe BillT knows if the '66 was different from '67.

The bolts through the fender would be correct for '65-66 N15CS/G15CS, with the cover having the white piping around the top edge. The rear tab as in GP's pic came out in '66 and ran to the end of production, though the cover changed in mid-'67 (no piping)

Thanks! were any of the seats (earlier?) mounted in a way that the bolt(s) at the rear didn't show?
My bike has a 'creative' cover, with white piping that transitions from the upper edge to the lower edge, I might keep it