Since there is no evidence for a first loud shot before Z190, and that is acknowledged, it is a tricky task to place the last two shots. Makes perfect sense for them to be close together, sightly before or after the head shot (I think the third one was probably after).
Back to the fact that the the best witness information points to the first loud shot being at Z190-224. I'd like to present another exhibit:
Edward Bauer and seventeen other firearm experts have weighed in on the serious likelihood that the first shot from a newly-assembled MC would be very inaccurate. Edward Bauer uses this information to promote a theory that has Oswald zero-in the MC by intentionally missing the Limousine for his first shot.
https://thefinaltruthjfk.blogspot.com/2015_02_01_archive.html
Unfortunately, this information must be considered along with the superior evidence that there was no first missed shot. If the first shot missed, it was less than 1.5 seconds before another didn't.