Based on the pic, isn't the black plug in socket A? Socket B is where the rear spkr pins are.
Also a simple question - have you checked the fader setting on the radio to see if the rears are active?
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GPRPCA Chief Driving Instructor
2008 Boxster S Limited Edition #005
2008 Cayman S Sport - Signal Green
1989 928 S4 5 spd - black
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