He’s quoted as saying “my god, I’ve been hit” which would have been before the frontal throat shot. The way I understand it the first shot hit the pavement and fragments hit him in the back of the head and he could have said it then. Or, after he got hit in the back so two opportunities for him to speak.
Instead of trying to figure out how many shots there were, count the wounds;
1. JFK being hit in the back of the head with ricochet fragments
2. JFK being hit in the back.
3. JFK being hit in the throat, was described as an entry wound.
4. Connolly hit in the back
5. JFK being hit in the head.
An interesting observation I made about the throat shot, if that bullet is the same one that went through the windshield then there was another shooter in a parking lot on the other side of Commerce Street. That makes possibly four shooters, 6th floor TSBD, DalTex building, grassy knoll, and the parking lot.