There are 2 7 mm screws that hold the light in they can be found on each side. If they are not loose remove the light and check to make sure the screws hold the light body to that black plastic frame are not loose or missing. The small screws on the inside are phillips head. The light assembly also set in 2 plastic plugs and you will find the pins that go in them on the bottom of the light. If the plastic is missing it could cause the light top rattle.