I'd use the sound tube hole. I had to run a trigger wire from the door lock through the bulkhead connector in the door jamb and it was a PITA. Couldn't get the grommet to seal right. Almost had to pull the fender.
'13 Deep Impact Blue GT, auto, BBK cat deletes, GT-500 A/B's, C&L tuned DiabloSport inTune, sound tube delete, BBK 85mm TB, JLT oil separator, NX plate kit.