Red Matrix Shard

The starting location (marker is orange) is on the world map. The datacron itself is located in The Ruined Atrium of the Tomb of Tulak Hord (marker is green).

+2 Willpower Datacron

The starting location (marker is orange) and the datacron itself (marker is green) are located in the Lower Wilds. Both locations can be seen on the Korriban world map.

+2 Endurance Datacron

The datacron is located near the Departure Shuttle (marker is green).