By default it will mine on eligius at the burn in address associated with your account. The account will already contain any coins the unit might have mined during the HF burn in testing. In my case around 70 mBTC. It is running @ 422 GH/s

For factory testing an initial Bitcoin wallet was generated on this device in order to perform a live test of your product.  As a gift to you, we are providing you this wallet so you can claim any mining proceeds from the mining pool (Eligius) that may have accrued, but we do not imply that any have accured, or that the mining pool, which is beyond our control, will release any proceeds.