It's also currently missing hanger parts which are out being refined/machined. You can see how it works in this student's prototype video though. The arm reduction has been calculated to do the lifting, and some testing at the scrimmage confirmed it, just need the hooks now!
http://www.youtube.com/watch?v=xVJi6eofcI8
Also, here's a fun little button with CAD to compare the actual bot to
http://i.imgur.com/6xSjems.jpg
-Akash