On the BeSafe toddler seats you will find Velcro under the shoulder pads. Open the bottom of that Velcro and place each part of the Belt Guard between the Velcros of the shoulder pads. For the right angle, make sure that the shape of the Velcros on the Belt Guard parts follow the shape of the Velcro stripes on the shoulder pads. Align the Belt Guard with the bottom of the shoulder pads. After attaching the Belt Guard parts, make sure to close the Velcro strips of the shoulder pads firmly.