These two bolts hold the regulator stops. Once you have the regulator reinstalled you can adjust the regulator's up and down stop points by loosening these bolts and moving the stops as needed. There are also glass stops on the base of the glass as well that can be adjusted. Apply silicone spray to the window glass runs to lubricate the glass movement. It's much easier to do this at this time then from the top of the door, where it will get all over the glass (trust us, we tried!).