The wrist is in exactly the right position at z271 for the bullet exiting just below the right nipple. The right elbow may be pressed against the lower ribs but the radius is a few inches in front of the chest. It does move between z271 and z272

but it is constrained by the elbow that is pressed on both sides (the elbow is between the seatback and the lower ribs).
Come on Andrew, let's not go through all this yet again.

Just be honest.
Look at the image of JBC's jacket above and how low down the bullet hole is.
Remember the bullet exits on a downward trajectory, so his wrist would have to be even lower than the bullet hole.
Now look at how high up JBC is holding his wrist in z271.
All you need to do is be honest.