subwoofer on stock radio for 05 R50?
 

Hey guys, I've got a subwoofer and amp sitting idle that I've offered to install in my friend's 05 R50. The stereo is whatever comes stock.
Is there a subwoofer out on the back of the stereo? If so, what's the best way to access it? Is it neccessary to remove the dash?

Any help is appreciated.

Cheers