TweetI've got a high end Yamaha reciever myself. Awesome recievers!
Anyway....To answer your question, you cannot hook up your shelf system to the reciever unless your shelf system has outputs for the cd unit. I personally have never seen a shelf system have outputs for the cd player because they have their own built in reciever so in all essence there is no need for external hookups. So most likely your out of luck on that one.
Out of curisosity, if you look on the back of the shelf system are their any red/white outs? if so write down what each output says next to it and I may be able to walk you through how to rig it. Again, I highly doubt you have outs you probably only have inputs.