Revell 1/196 USS Constitution "Old Ironsides" Help?

EDIT Nevermind, I figured it out. Just need some chopping, and a view from a different angle. =)

I’m currently stuck at step 13. I was hoping I could find someone else building it, or has built it that could help me?

I can’t seem to get both piece 20 and 21 attached as it shows in the diagram. Maybe I’m looking at it wrong or something, but can anyone help me out there?