stalk control help

So iv installed a xtrons td696as head unit and you guessed it lost stalk control, but I new that was coming, I'm lost on what adapter I need or even if I need one, as the head unit has a built in bus control. 

I'm not shore on the connections as well iv got the 12v / 12v sw / ground sorted, but struggling with the bus control. 

My car is a xsara Picasso desire 56 plate. 

Any help would be much appreciated