One more pic of the drains inside the front fenders (wings)
As far as i can ascertain, the one on the vertical panel releases water that comes from the grilled vents in front of windscreen. Most of that water will enter the second drain hole on the horizontal surface in front of door...and then exit the drains in sills.
That vertical panel looks good now(!)..but both sides had rusted towards the front, not becos the drain there was actually blocked, but i suspect because either
a) there was crap inside that trapped some water, or
b) a previous owner had ritually (or for a long period of time) parked the car sloping downhill, outside..thus allowing water to sit in the fwd section.
Just a theory
Paul