1967 fastback interior questions

Come up over the inner wheel well on both sides, from the trunk.
Tie string to new wires and vacuum the string to location in C pillar.
Thank you! I am finding by probing with a wire that (so far) i cannot seem to get into the cavity just above the sail panel, right above and behind the quarter window.

I'll take a pic in the morning and report back.

Have a great weekend!