you'll find three hatches leading to different levels of the Habitation Deck. The bottom two are dead-ends, so you'll need to climb your way to the top hatch by again freezing the wall monsters on the right and using them as platforms to jump from. Once you're up there, you'll find a whole mess of cute critters playing in a glass cage. Walk to the far left and a shutter will block Samus' access to what appears to be a control panel on the other side. Reaching this panel will require a bit of creative shortcutting. First, bomb the left set of Fake Blocks on the floor, and drop through to the second level. Now, if you bomb the far left set of blocks on the second floor, you'll find that they're actually Boost Blocks, so be careful not to bomb any other blocks on this floor; you'll need the real-estate for a runway. Open the shutter, start from the right side of the room (but don't leave), speed up to clear these blocks, and fall to the first floor. Here is where you'll find your shortcut.

First, run through the first shutter to the right to grab a Missile Tank in plain view. Now, head back to the left and jump into a hidden hole in the wall. This will take you to a vertical shaft full of your favorite wall monsters. You know the drill; freeze them and use them as leverage to jump to the top of the shaft. At the top, head to the right to find yourself at the proper side of the control room. Activating the controls will free the cute little critters -- otherwise known as Etecoons and Dachoras -- from their cage, and your computer will update your mission objectives to return to the Navigation Room.


sources : http://guides.ign.com/guides/16227/index.html