they are in a side quest Exchange Vs Twi'lek Rebels: Basicly the exchange is in control of most the planet and the twi'leks are tierd of it, so they rebel. However they do not know who the leader is, only 2nd in command.
Lightside way: Join Twi'leks in rebellion
Dark Side: Join Exchange in killing the rebels
The exchage will have many more men and war droids too
Next: Finishing the cantina!