Some information is known about Scribe annotation storage from
previous examination.
Books and personal documents in KFX format contain a .yjr file found in the .sdr folder associated with the book. For non-Scribe devices that contains all of the annotations made to that book. On a Scribe the .yjr file also has links to handwritten annotations. Those are stored as strokes in an SQLite database which can be found in a folder associated with the book:
/.notebooks/{ASIN}!!{CDETYPE}!!notebook/nbk
Amazon may have used the same mechanism for annotating notebooks. If so then it is possible that each notebook has main KFX file holding a copy of the template for each page and an associated .sdr folder with a .yjr file linking to the SQLite stroke database for that notebook.
It might be worthwhile to search for such a folder structure, possible in a hidden subfolder of the documents folder of the Scribe. Or perhaps these are stored somewhere else, such as in the GUID named folders under .notebooks.