Sedan Door Glass Installation Question

One side done...install glass and regulator in door and leave it sit in the bottom (don't put regulator in position), let it lean towards the inside of the door so you can get the vent window in and into its installed position, undo the angle bracket that holds the bottom of the rear vertical track, tilt the vent window back, make sure the back of the window is in the track and get the front corner of the window into the vent track (grab vent window with one hand and bottom of glass with the other to do this), tilt the vent window back into its installed position, lift the glass and regulator up and put a block under it to hold it in position, bolt the regulator up, install window seals, bolt in vent window.