High Availability on Cisco WLC 5520

Hi All

We have a Cisco Wireless LAN Controller (5520) running as single point of failure. We have purchased another 5520 (both running same OS now). We intent to put them into a HA configuration.

My question is:

Do just need set up the psychical side & add the IP addresses of the interfcaes/ RA ports etc and the rest of the config will sync once they reboot and form a HA pair?

i.e. Do I need to setup all SSIDs etc onto 2nd WLC before forming HA pair?

Thanks in advance