After removing the original screen, keep the logic board facing you the way it was.

Take the new screen and slip the flexible piece of connecting circuitry under the grey plastic flap that you pried up in step 10.

Push it gently but firmly until it does not move any further to the left, then close the grey flap.

After this, the screen can be pushed down and clicked back into place.

To reassemble the phone, reverse instructions.