Luminoth laser turrets are present in the Vault. Four of them circle the corners of the room, hanging over top of platforms containing Spinners. By using a Bomb Slot inside the Luminoth vault chamber, a beam of light from the chamber will fire through the turret, but Samus must utilize the Spinners to turn the turrets in the right direction before she can lift the chamber and collect the Screw Attack.
"Structural analysis complete. Luminoth laser turret is aimed with a Spinner system. You have been given access to the Spinner control system."
"Structural analysis complete. Luminoth laser turret is locked in place. Spinner system offline."