Can't get keyboard back on...

What's the trick? I took the keyboard/top case off to replace the optical drive, and I cannot seem to figure out how the right side of the top case fastens back in.
Do I line up the slots above the optical drive first, then the bracket above the hard drive?
Vice versa?
Both at the same time?

HELP!
Thanks..........

13inch Macbook, now with a SuperDrive!

Mine just sort of popped back... i lined it up and pressed really gently and screwed it all up again. Is everything lining up right? Some of those little plastic bracket bits have dropped off mine.