for what it's worth
6-17 next direct hit on Clock, with 90º angle hits at 6-2 and 7-2
is this a sort of QClock Proof?
She gives us the 6-3 date, and maybe the 2 [mirrored] pens (instead of 1) means to mirror the angle (on the horizontal axis in this case) AND add 1 or 2 minutes/days? I'm off by one day with my 6-2 result, but if you compare her paper's left margin to the photo's left margin, they're off by about 1/2 minute/day in the direction that (if corrected) would adjust the 6-2 result to a bisection of 6-1 and 6-2, which (+1 or 2) yields the 6-3 date (and 6-4) she openly states.
The answer is probably in some variation of what I've stated. OR no connection at all. Kek