To install remove factory nut from under the lock down bar. Remove the factory black spacer ring and store it in your coin box. Remove tape adhesive from back of mod. Insert button into skull pile and in one straight motion install the button/mod onto the lock down bar. Keeping note of the button going through the white spacer and the skull pile being straight left and right. The tape is there to help the skull pile from being able to spin around should someone push on it. After you have installed the mod and button, screw on the factory nut onto the bottom of the clear button. No need to over tighten the nut just make it good and snug.