If it's not visible there in 6.0, then I'm not sure where in GUI the information can be found.
For purposes of troubleshooting, you can also get the active FSSO server via CLI (if vdoms are enabled, in the specific VDOM with the FSSO connector):
#diagnose debug reset
#diagnose debug enable
#diagnose debug auth fsso server-status
The server (connector) name and IP address of the active FSSO server will be listed.
+++ Divide by Cucumber Error. Please Reinstall Universe and Reboot +++