Choosing the location to mount the D Ring is your discretion based upon your needs. Select a location which provides structural support for the D Ring and will meet your Cargo Sport Bag pulling needs. Place the D Ring in your designated location. With marking device, mark the placement of the hole. Be sure to measure both sides and make sure that they are in-line with each other before drilling. Using a 1/8” drill bit, drill into the metal. Insert screw through D Ring mount plate, then through interior trim (if applicable), into the metal surface; tighten using a Phillips screwdriver or power driver. Caution: Check the back side of mounting surface to be certain not to damage wiring or other vital equipment, or screws will not go through exterior skin/metal when drilling/screwing into surface. CAUTION: CHECK THE BACK SIDE OF MOUNTING SURFACE TO BE CERTAIN NOT TO DAMAGE WIRING OR OTHER VITAL EQUIPMENT, OR SCREWS WILL NOT GO THROUGH EXTERIOR SKIN/METAL WHEN DRILLING/SCREWING INTO SURFACE. NOTES: If you are drilling through interior, be sure to take special care in protecting the material surface before drilling to avoid damage. The screws provided are self-drilling therefore if using a power driver you can elect not to pre-drill the holes. Overall strength of the D Ring, subject to the integrity of the mounting surface