A8n sli deluxe = S/PDIF cable

Hi guys,

I bought this graphic card:
Asus EN9500GT/DI/512MD3
http://asus.com/products.aspx?l1=2&l2=6&l3=760&l4=0&mod...

I have this motherboard:
A8N-SLI Deluxe
http://asus.com/products.aspx?l1=3&l2=15&l3=148&l4=0&mo...

I want to connect my 24 " LCD Monitor with my graphic card with a HDMI cable.

In the graphic card box I got an S/PDIF cable which I have to connect to my motherboard to get sound with the HDMI cable.

Problem: Where I must connect this S/PDIF cable on my motherboard? Is that generally possible with my motherboard?