For completeness, here is the answer I got from Mr Raby and crew:
The black wire will insert into the "B" embossed side of the connector (look hard - it's there). The red wire with the white trace will insert into the "A" embossed side of the connector.
If you look at the wires on the other plug, match the black wire to the black wire.
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2001 Boxster, 5 spd, Seal Grey
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