After the player has been and talked to Ratcatcher, they will be directed to head to the Research Institute: South complex located in the bottom left hand corner of the map, starting the next portion of the main mission chain.
Navigating inside which ever way the player chooses, they must reach the third floor (either by stealth or brute force) obtain the documents and head out.
(Note: The north and east gates are possible options, as well as the underground entrances (originally retail's exit))
When the player goes inside the central building, they will have the choice of heading either left or right up 2 identical flights of stairs to the third floor.
(Note: 2 soldiers patrol on each of the 3 floors, caution is advised when when sneaking or using brute force)
Once the player reaches the third floor, they will find the Military documents resting on a table on some shelves (located in the north west corner of the cubicle room). Once they have been picked up, the player will be prompted to take them to Barkeep.
Head back outside the building and make a break back to the Garbage entrance, avoiding (or intercepting) the military patrols along the roads.
Once back in Garbage, head to the top right hand corner of the map to the Duty Checkpoint
§Note: To the left of the road (in amongst some concrete slabs) there is a Blind/pseudo-dog pack laying in wait for the player, as well as 2 Chimeras just down the hill from them. Use caution while running back through this area of Garbage)