The card does not have a SPDIF connector.  The card has its own audio chip, negating the need for a pass-through.  The only thing you'll need to do is connect an HDMI cable from the card to your Audio input, whether it's a monitor, TV, or a receiver.  
 
When I've run a card to my TV, there's usually another option in the Playback menu with the name of the device you're plugging the audio into to select(e.g. LGTV, Receiver, etc.), rather than the Nvidia HDMI Output.

Awesome.  Let us know if you run into any problems.