No need to use screw or glue or anything just pop it back into place, feel around with your hand, it's kind of hard to see and there is two spots where it should clip in. Depending on whether or not the little actuator as i call it( or air spring) is collapsed or not. I dinked around with this for a little while while installing my ipod2car adaptor as i wired it through my glove box. I used a piece of electrical tape to hold it in place. It's stayed for 6 months or more and hasn't come off. It will again need to come off if you ever change your cabin filter so i wouldnt start gluing or screwing things in.