Yeah, looking at the app note again,
They have removed pins from the plugs on one of the MiniDSP's. There are photos at the end, but I'm a little confused. The pictures may show an old rev board, the plugs face out and are male. From the pictures on the site of the MiniDSP, it looks like the plugs point up and are female. I wonder if they just have a custom cable. That's another thing, I have not seen any cables available in their accessories.