72 duster quarter window help please

My 1972 duster is a racecar guy before me put lexan in instead of glass. I took the lexan out and need to put the glass in the chrome trim and gaskets all are there I bought anothrr set that I want to take the glass out of this one and put the glass into my existing chrome trim and housing thats still in the car. The one I have now looks like in the trim the glass has holes driilled inyo it to keep the glass there