Reply to Traktor S2: Laptop Speakers as Main, Headphones on PHONES jack for cue?

I spent all my money on buying an S2 because it was cheap, but when I got home, I realized I didn't have enough for moniters T_T So I am stuck with my built in macbook speakers. The problem is that in the audio settings I can only choose to use the Traktor soundcard OR the laptop speakers.
How would I get it working so that the main audio comes out my laptop speakers, but at the same time I can use the Traktor S2 PHONES jack for my headphones / cue thing? Thanks guys!