wadia 170i to dac magic

Confused about the hook up - the dac magic manual shows the dac output going to the amp (we know the coax will go to the Wadia), so where does the pre amp fit in?

So amp to dac (?), dac to Wadia...pre?

I thought it was amp to pre amp, CD out to dac, and dac to Wadia. That was my thought.

How do you do it?