I'm working on a restore on my TOTAN as we speak and this is the last area that I need to put back together (hopefully tonight!!!). I'll try to take some photos for you when I'm done. However, when doing a test fit last night, I seem to recall that the middle plastic should be trapped in the slot cutout in the front of your skill shot bracket. To me in the photo, this looks like your skill shot bracket is too low in the front, but maybe I'm not seeing it right. My early guess is one or more of your post heights are wrong.
Scott