Oswald's shot-1 ricochet was at Z113 or Z105.

[Marjan Rynkiewicz]

Bullet hole in floor of JFK limo, found during modifications in Dec 1963, & hushed up.  Notice that the hole is not round, it has been made by the remnant slug after ricocheting off the signal arm.  The copper full metal jacket broke in two as usual during the ricochet because it is made in two sections, & these were found in the limo (CE567 CE569).  This pix is not in Robin Unger's gallery, but he does know of the pix.
 

[Marjan Rynkiewicz]

I forget who drew this (might have been Myers). Its brilliant.  I don’t know whether it was meant to show JFK at Oswald's shot-1 at Z113  T138.  By my reckoning based on the pozzy of the white painted stripe on the south side of the limo i reckon that the limo etc is drawn one click before the shot hit, it is drawn at Z112  T137.  By my reckoning Nellie Connally was level with the end of the painted stripe when Oswald's shot-1 hit (ricocheted off) the signal arm, & the drawing has Nellie one click short.  Oswald shot at Z112, the slug hit at Z113, & the sound hit at Z114, if u want to get technical.
And it correctly shows that the limo didn’t go wide during the turn.  Brilliant.

[Marjan Rynkiewicz]

VICKIE ADAMS  Feb 17 1964.  ……. When the President got in front of us i heard someone call him & he turned.  That is when i heard the first shot.  I thought it was a fire cracker.  Then the second shot i saw the Secret Service man run to the back of the President's car.  After the third shot i went out the back door……..

[Marjan Rynkiewicz]

The ricochet gave us three lots of fragments.
The shower of small lead hit JFK in the back of the head, actually the right-hand-side of the back, koz he was looking right (Xrays).
The lead slug put a hole in the floor near the jump seats, & rattled around tween the driveshaft road & limo.
The full metal jacket broke in two as usual, & ended up hitting carpet tween the jump seats (CE567 CE569).

[Marjan Rynkiewicz]

Little black & white highway marker signs are near the signals & also on the 2 larger signs.

[Marjan Rynkiewicz]

Harold Norman was looking out of the 5th floor window directly under Oswald. 
FBI REPORT RE STATEMENT OF HAROLD NORMAN NOV 26 1963……………. He stated that about the time the car in which the President was riding turned on to Elm St, he heard a shot…….

[Joffrey van de Wiel]

The pictures, for some reason beyond my comprehension, fail to show up. Can you post a photo of the hole in the limousine floor?