Roof top Running lights electrical feed

[PbFut]

Attempting to run a wire to the roof top holes. Factory route as I understand is down the A pillar. When I attempt to feed a fisher cable, an old speedo cable, I can only get passage through a small hole inside the cab at the top junction of the A pillar and roof. Both Driver and passenger side the same. Hours of fishing to my original intended route at the cab corner is proving impossible to get past the roof joint to back panel. The cable hits and turns into the roof cavity. Was the factory route into this little hole in upper front corner and down the pillar behind the windshield weather stripping then into a small relief at the bottom of pillar where dash meets? That can't be correct. I would think the small hole at top would chaff the wire as it can't fit a grommet. Both sides the same and fishing into this little hole is a 5 minute process. I never could get the wire inside the pillar on either side.
Is there a trick to getting a wire feed into either of these two channels? Two days on one dang wire.