Are these locations static? I assume every player gets a new location with the wp to Leia after talking to the rebel coordinator.
Anyway, you have to talk to the rebel coordinator before talking to Leia, otherwise she won't give you the assignment for your final mission.
And bring friends if possible for this final mission
I know I'm shite as master pistoleer but it took me three times to complete this assigment solo. All red and yellow conned stormtroopers. First time I was db'ed, second time I didn't kill them quickly enough and they blew up the building I had to protect and the third time I was lucky because some enraged rancors from the lair nearby became involved
Luke