After Market Radio Installation 2000 GT

[dumpsterdog]

I bought a Sony stereo for my 2000 Grand Prix GT that has the premium system from Bose.
I bought the wiring harness, plus it came with the FM antenna kit.
My factory sterio has two clips that I had to pull out.
The harness only includes the hook up and wires for the larger clip.
The other clip with four wires has nothing to hook in to.
Do I need to find another harness for the smaller clip?
As you may have guessed, I am a rookie at this stuff.
Any help would be greatly appreciated.