The second card did not communicate on the bus, and only used its connections for power and mechanical support; the Dazzler could also be mounted "piggyback" with the second card attached to power using a separate cable instead of a slot.
The second card did not communicate on the bus, and only used its connections for power. The two cards were connected together using a 16-conductor ribbon cable, and could be mounted "piggyback" with the second card connected to power using a separate cable instead of using up a slot.