That is very interesting
It could explain the replacement of the windshield as per mfg. Plant management person
Check the Zapruder film https://en.wikipedia.org/wiki/Zapruder_film
It shows the shot to his throat and his head going backwards which indicates a shot from the front.
People laughed off and ignored the Grass Knoll theory for years but I think the new files kind of prove that it may not be a theory.