The WWN should be on a sticker on the cards, but you can find the WWN from the command line as well.
First run
#ioscan -kfnC fc
This will show you how many FC cards are installed in your system. Location names will be like /dev/fcd0, /dev/fcd1 etc. depending on the output, you need to run the Fibre Channel Mass Storage Utility Command like so.
#fcmsutil /dev/fcd0
Output of this command will show your WWN.
