That's sure odd which direction the car was facing but likely means a whole lot of nothing. The reason I say it's odd is because you would think the car entered the water front first. Then the weight of the engine pulls the nose down. To turtle (which it did) I'd THINK it would have continued the motion it was going in due to the engine pulling the nose down, meaning it would end up on it's back with the front facing the shore. I had to use my hand. lol Palm down with fingers pointing toward the shore as it enters the water, then fingers pointed down as the weight pulls the nose down, then it keeps going in that direction until it's flipped over onto its back. That points my fingers (the front) toward the shore, not away from it.
Due to how I imagine a car to turtle, I just can't image the front facing away from the shore on its back.
Unless it entered the water in reverse. I just went through that same exercise backwards (lol) and now my fingers are pointing away from the shore.