[MarbleRyeMulva]

Originally Posted by spinjockey

Depends on the original configuration. If you have an amplifier then the B connector never existed. The amplifier preamp outputs are on the C (yellow) connector.

Look here: https://www.pelicanparts.com/techarticles/Boxster_Tech/88-ELEC-Radio_Install/88-ELEC-Radio_Install.htm-

If you never had an amplifier then the speakers were wired directly to the head unit and you can recreate the B connector as the plug socket is the same as the A connector.

Thanks for the reply - looks like I did overlook the fact that there is a factory HAES amp. I imagine it will be possible to rewire the A connector to plug into the PCCM+, but not sure what to do about the missing C. Do you know what the part #/OEM C plug name is so I can order a new one (if that's even possible)? Suppose I could also 3D print the plug to throw pins in if someone has the measurements.

Photos of the current state of the harness: https://imgur.com/a/TJ7yLnc