Steepletone rock 50 jukebox cd fallen off post?

Does anyone know how to get to the decorative disks in the jukebox dome ? one of mine has fallen off of its little post. I would like to be able to get into this area to put it back on.
With the back off the jukebox, I cant work out how to get into the dome. There are four screws up under the dome shelf but I don't want to unscrew them in case this isnt the way.
Can anyone help ?