Help... with thrird brake light harness

So I bought this car and the third brake light doesn't work, sockets are missing.
found a wire with a plug on the end of it tucked into the hatch as you can see in the pictures, I bought what I was told was the right little harness with the sockets different plugs...
If any of you guys could take a picture of the connectors and harness in your 90 LX that would be a big help.
I don't know if the wire I found in the hatch is the one for the third light?

here is the links to the pictures.

http://i681.photobucket.com/albums/vv176/gm991/mustang/harness.jpg

http://i681.photobucket.com/albums/vv176/gm991/mustang/harness01.jpg

thanks

So if anyone could help me out I apriciate it.

thanks