Ancient Chozo machine

The ancient Chozo machine is a mechanism featured in Kraid's Lair. In Metroid: Zero Mission, Kraid's Lair featured zip lines, tracks along the ceiling Samus could traverse by holding a block. To activate them, however, Samus had to track down this machine and morph inside it. After activation, the machine flashes and the zip lines can now be used.

Metroid: Zero Mission: The Official Nintendo Player's Guide
TURN ON THE POWER

"An ancient Chozo machine sits at the left edge of a lava pool. Jump onto the machine then roll into Morph Ball form to activate it. Every red light in the lair's ceiling will illuminate, indicating that the area's sliding mechanisms are up and running."