What can I do with the blank displays on the first tier?

Hint 1 of 9:

First of all, if the doors are closed, play with some controls nearby.

Hint 2 of 9:

Turn on the display of Rama that's opposite the blank displays, and press the
button to start Rama's rotation on the display.

Hint 3 of 9:

Now, you need to drop off some of the items you've been collecting.

Hint 4 of 9:

Look for something in your inventory that would fit here.