Okay,.. my car is 8,000 miles away so I can't check it out phyiscally, but I think I can help you on two: The blue wire is for your oil sensor, and the green wire is for your temp sensor. The pink doesn't ring a bell. Gray wires are for the dash lights and you'll need to splice into those for lighting for your gauge package.
On cars with the idiot lights, the factory cut the one green wire and just used the other green wire (dark/light green). I wish I was home and could pop the hood on mine to check which - but it pro. doesn't matter as long as there is a signal to the temp gauge.
-r-
