Death Star Plan 1: Once you reach the large open area. It's sitting at the end.
Death Star Plan 2: During the R2 segment. It's sitting in the room with the first required panel. You can't miss it.
Death Star Plan 3: After the forcing the pieces together to get to the higher platform. It's sitting right there.
Death Star Plan 4: After opening the force field, head down the split path. Take the hover upgrade from the protocol droid and hover up. It's sitting on the higher platform.
Death Star Plan 5: It's sitting at the back of the chamber.
Revealed Code: Start, Start, Left, Down, Down, Down, Down, Right.