Hi,
on the HWU you select Controllers -> FAS Series -> Your Ontap Version -> 3210 -> Expantion Slots -> Supported Adapter Cards.
Then you get a complete list of cards witch are supported. On the left side of the list you see the priority. So you start on the top of page and ask yourself if you have such a card.
Your card has priority 26 and if you have no other card from the above installed you can take slot 1.
Alex