Thanks. I was just coming back here to answer my own question...
I found this photo which shows the connector I referenced. My radio was not plugged in (the multi prong gray cable from the radio that goes to the box under the dash was coiled up under the console). There were several bare wires twisted together for the speaker connections (all gone now), and some butt splices in wires.
Someone (ahem - Circuit City free install?) also skinned the door switch wires to tap into them for an alarm that is no longer in the car.
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