Welcome to the forum. Do you see the rear speaker wires in the harness coming out of the radio, or the harness that is part of the vehicle itself? While I don’t know the answer, I would assume that if you see those wires in the actual car harness (not just in the harness attached to the radio), logic would think that they’d run to the rear door destination. The only way really to find out (unless you can find someone who has installed rear speakers in the 2025 Swift) is to open the door card and look.

 

Hey All.

turns out its only run to the I pillar the one between the doors.