Half Vinyl Top with Moonroof

How are these things "cut" to fit the moonroof? Are they folded under to the underside of the roof skin? Is there a trim ring/pieces of trim around the moonroof or something? All of my moonroof cars always had the vinyl top removed before I got the cars, so I don't know if I'm missing parts

My '73 needs a new top and I have the material on hand to replace the top. When my dad installed the current top, he never cut it for the moonroof (just installed it right over the moonroof)