Not sure if this is a "wiring" question or a question of the location of the holes in the trunk floor for staggered shock cars ! SO......
All cars had the rear harness run down the driver rocker through the rear quarter AND THE YELLOW fuel wire across the trunk floor to the hole to get under the car.
The wire runs over the tank at rear and through the trunk grommet. (This due to staggered shocks) I don't think dual exhaust has anything to do with it.
From under the car you can see the wire runs back toward the SENDER (remember this is SJ) I don't think all plants used as many clips.
The other area was RIGHT IN THE MIDDLE of the trunk -so if this isn't a repaired trunk with a wrong panel it could be a case of an owner "SHORTENING" the yellow wire ! (if it has been drilled on the driver side)
Mark