Do like I did - take all of it off that you can and add a piece of square plastic post (I used some self tapping screws and strapping metal to hold it in place) along the frame. Drill several drain holes in the bottom before mounting it. I glued one cap on the front and drilled two holes, top and bottom on the rear cap through the post. I use a small bungee to hold it in place. Some have put hinges on theirs, but I like keeping things simple.
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