Hey all quick question (photo)

[My1st Truck]

I have a Grand Prix CD player laying around in my Garage.
I would like to put it in my Lebaron. I have the Factory plug so I can wire it in.
My question is this. Do I need to hook up the small plug to anything?
I can't seem to find what is does in any diagrams. All the diagrams only show the use of the large plug.
See photo.
Thanks Guys.

[My1st Truck]

I figured it out. The small plug is for a factory remote CD player.