How to do the initail configuration for cisco FirePower 8250 chassis 2u 7 slots

Dear All.i have one  Cisco firesight mgmt center i.e 750 chasis,1u &2 cisco FirePower 8250 chassis i have connected the Cisco firesight mgmt center i.e 750 via console and have done initial configuration i.e IP, DNS , User name Now for cisco FirePowe...