For Breaking Code, go to the old Milita Base where you fought off the Genenosians between Camp Karnori and Outpost Largona.
There are two major buildings next to the generators you had to destroy in another quest. One building is a "open hangar door" where you go inside and destory the DataBase for another quest.
The Other major building is where you need to get into for Breaking the Code. Instead of a hangar door being open, there will be a "Single Doorway" at Coordinates X: 0259 Y:-1520 Z: 428. As soon as you walk in it will activate Breaking the Code Heroic 2.