How do I change the password on the 5G portion of our C6300 Modem/Router?

[Pamama4]

I have successfully changed the password for the 2.4G, but can't figure out how to do the same for the 5G.  

[TheEther]

The password for the 5 GHz network can be changed on the same screen as the password for the 2.4 GHz network.  You may have to scroll the page to see the password field.