1. Droid PositionBlack Sun Territory, Northern part, on a balcony.
2. Droid PositionBlack Sun Territory, on the top of one of three antennas.
3. Droid PositionBlack Sun Territory, Southwestern part, on a balcony.
4. Droid PositionJedi Temple, at the top of a huge temple stone pillars.
5. Droid PositionJusticar Territory, high in the air, on a platform with lights.
6. Droid PositionOld Galactic Market, on an antenna, high in the air.
Source: Official MCR-99 droid locations (hidden planetary achievements), MCR-99 Droid Locations post 2.0 on Swtor official Forums. We would like to thank SWTOR community members for all additional information.