Here is what Dr. McClelland wrote the day of the assassination, about three hours after JFK was pronounced dead:
From the handwritten statement of Robt McClelland written Nov 22, 1963 at 4:45pm on the cause of death of JFK:
"At approximately 12:45pm on the above date I was called from the second floor of Parkland Hospital and went immediately to the Emergency Operating Room. When I arrived President Kennedy was being attended by Drs Malcolm Perry, Charles Baxter, James Carrico and Ronald Jones. The President was at that time commatose from a massive gunshot wound of the head with afragment wound of the trachea. An endotracheal tube and assisted respiration was started immediately by Dr Carrico on duty in the EOR when the President arrived. Drs Perry, Baxter and I then performed a tacheotomy for respiratory distress and tracheal injury and Drs Jones and Paul Peters inserted bilateral anterior chest tubes for pneumothoracis secondary to the tracheomediastinal injury. In spite of this, at 12:55 he was pronounced dead by Dr Kemp Clark the neurosurgeon and professor of neurosurgery who arrived immediately after I did. The cause of death was due to massive head and brain injury from a gunshot wound of the left (sic) temple. He was pronounced dead after external cardiac massage failed and ECG activity was gone.
Yes, the cause of death was: "[D]ue to massive head and brain injury from a gunshot wound of the left temple." Yes, left temple(?). Not the back of the head.
Later (January '64), in the Texas State Journal of Medicine, McClelland told the publication this: "[T]he cause of death was the massive head and brain injuries from a gunshot wound of the right side of the head."
Here he says right side. Nowhere in either account did he mention the back/rear of the head.
Several of the other doctors were interviewed by the publication and gave accounts of what they saw. This was *before* they testified. To be blunt, they were very confused.
You can read them here:
https://texashistory.unt.edu/ark:/67531/metapth599863/m1/102Shorter: the accounts of the ER doctors on the location of the head wound are, for me, very questionable.