newbie question about roof rails?

[Chuck-H2]

Hello All, Im the Proud new owner of a 2005 LUX, question about the roof rails?, theres Keys in the glove box that go to the roof rails. What do these Keys do? the dealer didnt tell me if there to remove the rails?, or do they remove the end caps?. sorry to be a newbie.
( Looking forward to learning how to get the most out of off roading in central Calif. (Bakersfield.CA.)
save the Wave. Its a lost Art