[husker boxster]

I helped a friend put one in last yr, but didn't run across any of your issues.

https://986forum.com/forums/boxster-general-discussions/83293-pccm-install.html

As noted in my thread, not a lot of documentation. Prob b/c they want you to have Porsche do the install and it's so universal it would be impossible to document all the various options and models.