- Make your way back toward Harper Ferry.
- Start making your way to the South from that location to move toward the Armory you need to reach.
- use the train tracks to cross over the highway and then continue to the West to reach the small shack with the marker.
- Approach the terminal, Armory Access and access it.
- Do not use the options on the terminal's screen, instead opting to Load Holotape.
- Using this option, load the Master Holotape.