If you guys are referring to picture #9 for the starboard chainplate, I think that the owner used an old chainplate for a backing plate and the backing plate is what you see. It doens't extend far enough up to get to the side deck and picture 7 shows the port side chainplate in the original location on the forward side of the bulkhead. My guess is the backing plate was put in place to try and stop the bolts from pulling through a rotting bulkhead, as evidenced by the top of the "backing plate" in picture #9. It appears to be sinking into the bulkhead, and the water damage there tends to start at the top. Just my $0.02.