Vintage system with DAC question

Hi everyone! I just want to make sure I'm doing this correctly so please feel free to comment with your expertise. I'm in the process of setting up my (second) system from my college days. I have a Denon PMA-757 integrated amp, a B & O Beogram RX TT and a Sony CDP. I want to be able to also play Spotify Connect as well so I'm considering getting the Zen DAC V2 to connect to the 757. So my question is this: if I get a USB cable adapter from my MacBook or iPhone and Connect it to the Zen, all I have to do is connect the RCA from the Zen to the Aux on the Denon. Is this correct or is it something I'm forgetting?