Its a CN-1110-000.
https://docslide.net/documents/compur-shutter-repair-manual.html
EDIT:
The CN-1110-000 is a Synchro Compur, your camera has a Compur Rapid. The Rapid is the predecessor of the Synchro, there are some Rapids with the Synchro design before the name change. The basic build up is the same. There were production changes throughout the run under a Rapid or Synchro so the diagrams are not always exact.
I have repaired some Compur shutters by using the under side of the main plate of one shutter number and the top of the main plate from a different number as that is what matched the shutter on hand.
That part should float and require little spring action to get it to follow the track properly. The spring should push it in toward the center of the shutter if I remember correctly.