[danstub]

I replaced the stock radio in my 2000 986 with a Continental radio. Here are links to two installation threads that may help you to identify some of the wiring:

http://986forum.com/forums/performance-technical-chat/66343-continental-tr7412ub-stereo-installation-review.html

http://www.bergvillfx.com/files/Continental_installationmanual.pdf