I was looking at that last night and put these images together, and marked the area of the breach but I think the looks are deceiving a bit because they do not show the temporary repairs at the bottom of the destroyer.
With the release of the dry dock pictures several other questions emerged in my mind... Relative to your pretty good assessment in post #577, I noticed the horizontal distance offset between above and under waterline contact points (I marked in the following image). Prior to seeing the new pictures I was expecting those contact points to line up vertically. My guess is that the delta is at least 2+ meters.
This mismatch between (above/under waterline) contact points makes me believe that the first contact took place above the waterline, and that impact made Fitz lean/roll about 15-20 degrees to port, at which point the bulbous bow made it's way into the hull. My estimate is about 3.5 meters (11+ ft) of the bulbous bow penetrated and possibly lodged into the hull. This also explains the admiral's statement in the first press conference that the bulbous bow penetration almost reached Fitz's keel. I think it is evident in this picture that the steel plate welded/bolted to the bottom of the hull (without braces) is extending towards the keel (as a part of the temporary repairs).
All that said, it is possible that the bulbous bow may in fact saved the destroyer by carrying the vessel as opposed to chopping it up because the leading edge of the ACX's bow never got a chance to split the ship open. In other words, structural integrity of the hull above the waterline on the stbd side of Fitz was preserved (as you drew it on your diagram) with the gap between Fitz and the leading edge of ACx's bow between the contact points. My guess is that the bulbous bow was lodged into Fitz for some part of the 90 degree hard starboard turn ACX made, possibly with pretty violent dragging assistance from the Fitz (depending on the speed of Fitz at that point).
Here is the picture of ACX I used for my estimate for the size of the bulb transposing the distances from the draught line (each segment is 1 meter). The bulb looks to me about 4 meters long and it's radius is around 4 meters as well.
Source for some pictures used: link