I'm wanting to install a rear seat/cargo box. However, due to the Polaris Sportsman flat rack with holes, it's looking a little tricky for me. Besides using u-bolts does anyone have ideas how to do this? I saw some plugs that expand when you screw them in on Amazon but the reviews say they don't really hold well and a seat could be dislodged.
Thank you for any advice or links!
Thank you for any advice or links!

