Ok, so here is what my oscilloscope has told me:
Female side, wires behind connector, heavy gauge left (pinout not shown below), small gauge right.
on the 16pin
grey connector (upper)
-none- -none- gry/wht gry/yel blk blu/blk blu/brn blu/grn
-none- -none- gry/grn gry/vio none -none- -none- blu/brn
preamp level
Right rear: +gry/wht -gry/grn
Right front: +gry/vio -gry/yel
12v remote wire
single black wire
speaker level
Right rear: +blu/grn -blu/brn ? not checked
Right front: +blu/blk -blu/brn ? not checked
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on the 16pin
black connector (lower)
-none- -none- wht/yel wht/blk yel/red yel/brn blu/wht blu/brn
-none- -none- wht/blu wht/grn --none- -none- --none- --none-
preamp level
Left rear: +wht/blu -wht/yel
Left front: +wht/blk -wht/grn
speaker level
Left rear: +yel/red -yel/brn ? not checked
Left front: +blu/wht -blu/brn ? not checked