From the time the limo left Love Field until JFK disappeared behind the sign, his right elbow was resting on the side of the limo or extended outside of it as can be seen at the 1:10 mark of this video://www.youtube.com/watch?v=WnlL-pucCj0The video shows his right side was as far to the right as possible.
Here is z226:JFK’s right ribcage is not only not pressed against the side of the car, we can see that he is farther left than JBC
Just one question. What have you been sniffing? At no time was JFK to the left of JBC.