98 S70 GLT stereo hookup with wires and antenna

[curtisdavis1983]

I have a new AVH 8400BH that i have installed in my 98' Volvo S70 GLT. I have it hooked up except for the fact that it seem there are wires that I could not find where they hook up. I have a automatic antenna and it will not activate when the stereo is turned on.
There is also one wire, that isnt the power cord, that seems it will only hook up to the stock stereo.
--> sorry, but i couldn't get photos I've taken to download.

These are the four wires I could not hook up that came with the new unit
orange w/ white stripe
purple w/ white stripe
yellow w/ black stripe
blue w/ white stripe