I need for one specific purpose to build mikrotik router with wireless AP function. It should be wireless N. I choose Atheros 5418 AR5BXB72 AR5008 mini pci card but this card has 3 antenna connectors... Here is a problem couse there is no place for third antenna on the box so I wonder can I connect only 2 antennas? Card supports ABGN but A will never be used... So May I connect 2 antennas and which of those 3 to exclude?