Framework in nose of 5th wheel

I had a light cover come off and leak water into the nose of my Keystone Outback. The filon delamed on that side below the light, not too bad but I look at it everytime I look at the nose. I am going to pull the filon off and replace it and want to have an idea of what to expect when I open it up. It is aluminum frame and I may add more framing if I feel it requires it. Anyone? A picture of any brand would be appreciated.