I think Jared is asking whether the 10mm is to the edge of the hole, or to the centre of the hole.
Jared, I couldn't find a definitive answer either when I did mine. I just eyeballed it. First off, I did a 10mm centre but it visually looked too close, so I just pushed it in a little. This shot of the RS suit shows placement. Unfortunately, no tape measure on it
Edit - Hmm, pic didn't copy across. Oh well, check out the photo reference gallery