The mistake You are making is with the positioning of JFK. JFK is Not anywhere close to being seated near the center of the JFK Limo. Just look at the Open Space between JFK and Jackie. Just look at where Jackie's flowers were laying down on the Limo backseat. An alleged bullet that Exited the throat of JFK would have been just inside the passenger side of the Limo. JFK's (R) armpit is almost directly above the side of the Limo. When Kellerman is standing outside the Limo and leans into it in order to unfold Connally's jump seat, he bends over from the waist and extends his arms into the car in order to unfold the jump seat which is close to the middle of the vehicle. At Love Field after JFK sits down and leans back into his sitting position, he shakes hands with a man standing outside the car. JFK's entire (R) arm extends outside the car while he is facing forward. His (R) armpit is Outside of the car due to how close to the side of the car he is sitting. Just my opinion, but I believe JFK liked this seated corner position due to his back condition/back brace. The Love Field seated positions of JFK and Gov Connally makes it clear. JFK's throat is nowhere close to being in-line with the (R) armpit of Connally.