That was the first thing I did to my Prowler. I did it on my Rhino before and it works great. I even rolled it with my daughter in the middle and it was safe, safer than being on the outside, she is 9 years old. On the Prowler I cut 1/2 plywood the shape I needed for the bottom then had it proffesionally covered and them screwed it using fender washer from inside the plastic cover thru into the wood. For the back the same thing, I cut it on the angles of the 2 brace bars and them got 1 1/8 steel conduit clamps to mount it. Lastly I mounted a lap belt. It looks like factory and works great because her feet rest on the 2 spots on the engine cover. I feel safer with her between me and my wife than in the back.