70 Mach lock cylinder clip

[Restomod 10]

Dumbest question ever but when I bought the car the door lock cylinder retainer clips were already rattling around at the bottom of the door. Since I didnt take it apart I am not really sure which way the clip goes for sure. I see the slots on the back of the cylinder so it looks like the clip slides in east/west. But I assume the flange part of the clip faces the interior of the car correct? Seems like the round parts of the prongs will never make it past the slots of the cylinder? Anyone have a pic installed I can just see? I can find a million pics of the clip and the cylinder just not installed.