Rear Wiper Motor Removal

[Ratty]

Hello! My rear window wiper failed yesterday on 2002 Ex Sport. I am certain that it is motor or linkage. I pulled the black cover off the back, pulled all screws on cover, exposing gears and got the arm off the front. Now the question: how do i remove the wiper motor retaining nut on the outside of the glass? The nut is covered by a cone that seems to be attached to the handle - which is, in turn held down by the wiper motor retaining nut. Any help before i tear apar the plastic is appreciated!

 

[Ratty]

I feel better now that the Ford service guy looked at it and said, "Wow, that's gonna be a b*tch"

The plastic cup wraps up and around the large nut at the base of it and prevents a socket from getting access to the nut.