Twistgrip's 69 F3 340 GTS Resto

Wow, I've been following your restoration waiting for the point when you put the sill chrome on. And suddenly, poof, it's on! A few questions if you don't mind.

1) How did you lay out the holes for the trim clips? Im guessing you had to at least drill for the holes in the right side quarter panel.
2) Did you by any chance record the locations?
2) What kind of trim clips were on the ends where the screws are?
3) Were the clips in the middle of the moldings metal or plastic?

Thanks in advance from another '69 GTS owner who is facing trying to locate the trim clip holes.