1990 LX radio wiring..need help

my lx had no radio when i bought it, now its just about ready to drive and i've run into a problem with the radio harness. the car should have 2 plugs, i'd buy a adaptor kit for my new radio, plug it in, and go. the problem is one of the plugs from the harness has been cut out. I have been looking everywhere to try and find out what these missing wires go to, but im just getting more and more confused. what i have is this.

on the plug that is still in the car the wires are in this order to the plugs-

1) Nothing

2) Orange/ Blue stripe -"Antenna Trigger?"

3) Thick Red - "Ground?"

4)Orange/ Black stripe - ?

5) Blue/ Red stripe - ?

6) Thick Yellow/ Black stripe - "Switched 12V?"

7) Nothing

8) Green/ Yellow stripe - "Constant?"



Now as for the wires that are loose and I belive are for the other switch, there colors are as follows-

White/ Red stripe

Green

Blue/ Black stripe

Black/ White stripe

Purple/ White stripe

... I was looking at the stock amp just a min ago to see where the speaker wires themselves go to and found them intwined ina mess of other wires. Im not sure what to do from here. all i would like to do is wire the car up with a cd player, im not looking to put ina system or anything like that, stock speakers, stock wires, new radio. any ideas?

Thanks, Justin