The strap attachment points are held on by 3 philips screws remove them. Remove the rails, remove the front and back nuts that lock into the shell. Put them back on using the middle screw. Then drill through the front and back mounting holes. You will then need longer nut and bolts to attach for example a Team Wendy suspension system. Drilling the holes does not effect the function so can stick the original suspension back on if you wanted in the future.