You appear to have Gov. Connally's midline/spine about 12 inches left of JFK's midline/spine. What is the evidence that he was that far left?
A couple of items I have noticed:
1. In z223, the antennae on the left rear of the limo aligns with the outside of JBC's right shoulder from Zapruder's camera angle (~41 degrees).
A line drawn at ~41 degrees on this diagram of the limo puts the outside of JBC's right shoulder to the left of a line that intersects his seat back approximately 5.5" towards the middle, from the right edge of the seat. The diagram also shows an additional 2.5" from the right seat edge to the inside of the limo door. The rear seat, on which JFK was seated, on appears to extend another couple of inches to the inside of the right side of the limo.
In z223, The shadow of what I call the "roll bar" falls on JBC's left shoulder and across his torso at a place and an angle related to his position and angle of rotation.
I had to improvise by using a pen with revised dimensions for the "roll bar" in my 3D exercise. It is placed at a position in which it lines up with the images of it in both photos (z223 and Croft 161). The 3D program allows me to specify the date and time of day for the "photos" that it generates. I specified 11/22/1963 at 12:30 pm. I also oriented the limo to the compass that is part of the 3D program. As you can see, the "roll bar" shadow in my 3D image aligns reasonably close to the actual "roll bar" shadow in z223.