I have a wiring harness here from the European Atari/Namco Pole Position upright that uses the Japanese Namco PCBs (not the Atari-made PCBs).
It may be from a Pole Position II, but I'm not sure since I've never owned the Euro version. Tag is marked "A039499-01-"
A couple of wires changed on what appears to be the monitor connector, and a couple of the ground lines.
$30USD + shipping. I'm located in the US.
Thanks!