1971 Roadrunner quarter glass install

Hey guys i'm a little confused about putting in my quarter glass, do i just slide the track in from the top and guide the pivot arm into its track that is inside the body and then attach the bottom bolt and the two top bolts, how do I get the Regulator to attach then, do i install from inside the car, I'm totally lost on that part, can someone please tell me what hardware im missing for the pivot arm bolt, sorry guys first time doing this

you are missing a spring and a washer
that goes under that big bolt that connects the arms together.
if i remember i put the glass and track in together first then
i snaked the regulator and arm into place
and i connected up the window slide arm hole
to the glass last.