Hi there Gungel
I wish you the best of luck, since you have already ordered the card lets hope it works as you expect. I feel that shuttle has done very little themselves to promote the use of the mini pci-e Slot and part of the reason is the chosen locatation for the card under the motherboard. I feel that shuttle original idea for the slot was intel memory module. Any other type of module that requires items being plugged into them will require some head scratching and moding to make them work.
I still think that it would have been easier, to get USB version of the CETON INFINITY tv4 tuner, and use the mini pci e slot for something else, although I will assume you already own a pci version of the tv card and the radeon 6570
as your motive to give this a go.
Thank you and yes you're correct, I do have the Ceton and graphics card already. I should get the controller this week.
Regarding the miniPCIe location on the SA76R4. The slot is located on top of the motherboard on the left front corner. So it's fairly easy to plug in a card. It accepts half and full length cards. I'll add some pictures once the card is installed and hopefully running.