CE399 was the first bullet that struck JFK when he was between the lamp post and Thornton sign. I put it at or just before z193, after which JFK is seen to turn forward. This bullet passed through JFK’s neck without encountering anything capable of changing its direction. Where it went after that is a matter of placing both men in positions seen in the zfilm at z190-193 and seeing where a straight line points. It could not have passed to the far right side of Connnally at that point. So the only possibility would seem to be that it caused a wound to JBC on his left side.
It was on a downward slope at z190:

It doesn’t look like it would have struck the dashboard.
At z285 Connally is already falling back and Greer is turned around, which he said he did at the time of the second shot. I suggest the shot was at z271-272. His forward motion/recoil begins at z271-272. The hair on JFK’s right side flies up at z273-276 (Hickey observed this on the second shot).
The thigh wound did not occur on the second shot. JBC never felt the thigh wound.
Ok so you propose a Z190-193(approx ) shot hit JFK in the back and exited his throat and then bypassed JCs back entirely and the bullet came to rest in JCs left thigh yes?
A. How do you account for the thigh wound being shallow if the momentum of the CE 399 bullet passing thru JFKs back and throat was not reduced by very much, thus probably still traveling at 1500 ft/ sec when it would have entered the thigh of JC?
The test that shot a 6.5 mm Mc bullet thru 2 replica human torso models showed that the 2000ft/sec velocity bullet went completely thru BOTH bodies and kept on going and was traveling still at approx 900ft/ sec.
B. How can you reconcile that test with your proposed Z190 shot having bypassed the mass of JCs upper body , yet somehow the bullet is brought to rest by less mass in the thigh?
C. How do you account for the missing % of metal from the nose of CE 399, if it struck no bones in JFK or JCs left leg?
Your drawing to demonstrate how you think JCs body position was at Z190-193 looks like an extremely difficult twisted torso position that one has wonder if an older man like JC would even have been able to twist his upper body around that much while still leaving his left leg hanging to the left of his lower buttocks.
D.Can you prove from Z frames Z190-Z193 that JCs shoulder line is rotated to his right at greater than a 45% angle as your drawing appears to be showing?
E. Can you demonstrate how JFK and JCs bodys were positioned in Z frames Z270-75 so that the 2nd bullet passed by JFKs body completely yet hit JC as he leaned over and the bullet struck JCs wrist bone entering backwards and where that bullet went after exiting his wrist?