When you reach the section where Jango is behind a force field and there are two guns at the top. Go in the door at the left. You will see some circles on the ground. Step on one of the white ones and your partner (whether CPU or human) will step on the other. Once you are done with all of them, a dance mix of the Star Wars themes will start playing. The Kamino aliens will start dancing. After leaving the room, you will have to repeat it.