Thin rubber part into the hole on the screen from the inside of the screen. Then postion the screen as you pull back on the ram-air covers if you haven't removed them. Hold the rubber from the other side as you screw in the screw on the outside of the fairing. I have the same brain fart everytime i re-install. Good luck!
Put the screw in one or two threads, I put a little spit on the rubber, with the black cover held back I line it up and push it in with the screw. The screw makes the rubber stretch out and go through the windshield easier. Once in just tighten it up!