The schematics are not in the Laboratory, the way it looks on the map, but are in the north tower above. To get there, go through the small pass, past the log, and to the right. On your right is a slanted rock you can go up to reach the Keep. You can also go left or right on the east side of the keep and up the ramps, fighting the whole way. Once there, go to the east side of the keep and up the ramp to the northern tower opening. Inside, take the elevator all the way to the top of the tower. Kill the mobs there and take the Schematic ( 2809,2371 ).