Test-fit the regulator inside the door panel. You will need to pull the regulator in and out a few times to get the adjustable nuts to line up to the holes drilled in the door. Notice the plate that I am holding. This will attach to the regulator with the acorn nuts. When using the acorn nuts they will not be tightened to the regulator all the way, this allows for the window to move freely in the channel and prevents binding.