Does anyone have any photos or experience of what this installation should look like in regards to where and how the tray brackets get connected. I spoke with Coverstar and they told me the brackets actually get screwed into a 12" of concrete that we pour behind the polymer cover housing box, which means we are screwing through the housing into the concrete. Which is fine, but the top of the polymer box has a 2" lip that a metal beam runs though and it happens to be where we would be putting in our screws, so I'm a bit lost?