General Grievous. 4
There you will find a panel requiring a clone character#1_1. Use it and go through the opened gate. In the bottom part of the new location you will find an orange plate#1_2. Use Force to turn it so that you lead the minikit below the floor inside the labyrinth#1_3. Once you make it, the item will jump to the surface#1_4. Shoot it with a rocket launcher and pick up. Now return to the main corridor and go straight to a big room#2_1....