Connally's medical team would not have been aware of the fact that the bullet that struck JBC in the back had first passed through JFK and yawed upon exit. That produced an elongated entry wound that the medical team could have easily misinterpreted as a tangential strike which would produce such an elongated wound. The problem with that explanation is such a wound would have to have been fired from a near perpendicular angle to limo, which would mean a shot from the west end of the TSBD.
We know that the bullet did not come from the west end of the TSBD. If the doctors were correct, that would mean that JBC was not hit at z225. It was not until about z250 that his torso was aligned so that a shot from the SN would have struck him with his torso nearly parallel to the flight of the bullet.
The doctors were just going by the wounds and path of the bullet through the body they observed and the fact that the wrist was turned back facing the bullet. That appears to be the basis for their agreement that the torso was turned right and was "nearly parallel with the flight of the bullet".