[Mark Salvetti]

Don't you need a piggyback spade connector for the yellow wires? See this article:
https://www.pelicanparts.com/techarticles/911_starter_install/911_starter_install.htm

And this is a good thread too: http://forums.pelicanparts.com/porsche-911-technical-forum/424087-high-torque-starter-install.html

Mark