I assume this to have been done in an overhaul subsequent to the retuning to reinforce the point where material had been removed to shorten the spacing between the pad cups. On this shot of the foot we see the more obvious signs of retuning and later work done to reinforce or tighten the mechanism. To the right of the C you can see evidence of the original tone hole location. The key arm has been cut to reposition the pad cup. Above the left edge of the C pad cup the strap was cut to shorten the distance between the posts, and the tubing was cut to match.
Some people have a foot fetish.
Well, I have a penchant for an elegantly turned back connector. Of course, I won't turn up my nose if I come across a sexy little trill key, either.