To mount a Trasharoo garbage bag, follow these steps: Locate a suitable mounting point on your vehicle, such as a spare tire, roof rack, or other gear. Position the Trasharoo bag so that its straps are aligned with the mounting point. Thread the straps through the mounting point and secure them using the buckles provided. Adjust the straps as needed to ensure a snug and secure fit. Once the Trasharoo bag is mounted, you can start filling it with trash or other items.