Grooves on the sides, and just slightly more give than a wall by rights should have.

"Come see this," she invites Brin.

"Hmm?"

She shows her the panel. "Got any ideas that don't involve exploding this?"

She pokes it at various points.

"...Feels like the hinge is at the top, maybe? Near the clouds." The scene is of a stormy battle, bestial monsters and faceless soldiers. Lightning bolts stab down at the soldiers.

Is there anything she can use to pull the bottom part, then?

Nothing obvious.

Unusually, the lightning bolts are shallow channels carved into the face, rather than projecting slightly outwards like the other features.

...huh. Anything happen if she touches them?

A small static shock.

Brin perks up.

"Thought I heard something."

She immediately removes her hand from there. "Yes, that was the sound of hubris." She tries again.

Nothing happens this time.

Hmm.

"So what was the actual sound you heard?"

"Sort of- clicking?"

"From where?"

"Inside the wall."

...she tries lightly pressing the panel.

Nothing.

She tries tapping it with her nails.

Still no response.

"Just as I touched it?" She tries doing—other stuff to it, scratch and knock and touch and push and pull—

"Yeah."

None of those actions produce any discernible effect.

...okay what can the Force tell her about this if anything.

A strange sort of hunger, not malicious or predatory or intelligent.

...strange how.