0))white-------\
>-----(((0 1/8" headphone (minijack) connector
0))red---------/
In this case, you'll need a female stereo RCA to male 3.5mm stereo jack audio cable, like this:
Actually, you'd want a female stereo RCA to female stereo 3.5mm. Usually speakers have male plugs on them (at least all of mine do). I haven't seen these though.
You need THIS: