Stereo output wires

[crgf1k]

A few years back I disconnected my factory stereo from all the speakers, and connected the speakers to an amp which I plugged my phone into for audio.

Now I want to re-connect the stereo wires back to the door speakers, but I can't remember where the stereo output wires are. I thought they were under the driver's side kick panel, but I can't see where I cut wires or unplugged anything.

Thanks!