The tail light attaches to the underside of the saddle with two 1/4aluminum rods (available at most hardware stores). Use 2) M5x20mm socket head screws with nuts, and the provided clamps to attach the tail light to the underside of the saddle. The tail light housing is designed to accommodate LED strips which can be cut into 1.5 lengths. The top red LED strip is 6 inches long for the brake light the center area is for the red tail light, and the two outside areas are for left and right amber turn signals. The rest of the design coming soon.