The ‘magic bullet’ didn’t remain in Connelly’s body, it was found on the gurney that brought him into Parkland Hospital.
If you watch the Zapruder film, you’ll see JFK reaching up to his throat right after the car reappears from behind the sign. Connelly is turning around and Jacqueline K. turns towards JFK. A couple of seconds after that the back of JFK’s head comes off.
I don’t know or remember if it was ever claimed that Connelly died with a bullet from the assassination in his body.
Many claim the assassination came from two directions, both from the rear and from the front of the motorcade. It was very important for the theory of only one shooter that the number of shots was limited. Kennedy was obviously hit twice. There was a claim that there was another shot that missed and hit a curb. People have been chewing on this from the time that it happened.
It was claimed that before he was buried, Gov. Connelly should be examined for bullet fragments that some believed were left in his body. See my links 2 and 3 in comment #30. I do remember, because JFK was on the ballot for my first Presidential election as ayoung woman, and I followed the politics and assassination with great interest. The bullet on the gurney is not the other one which left traces in Connelly and could have proved that there was a second shooter, especially if the metal came from a different gun. So it was suppressed and that shlub Oswald remained the ONLY possible shooter. It was no doubt important to the people who planned the killing that Johnson carry on the Vietnam war without interference so his patrons could get richer.