2010 grand sport - options button

I have a 2010 Gr Sport. The vehicle came with an aftermarket radio/nav system. The original vehicle had the base radio system. I took the aftermarket out and replaced with a 2007 radio. Could not get the option button to work? Then re-programed the FOBS and still the option button will not work. When I plugged the replacement radio in there were only 2 plugs on the back. I see the vehicle has three? is something wrong due to the fact I do not have a 2010 radio?

please help?

2010 grand sport - options button