Marked locations on the map are the areas from where you can spot MCR-99 Droids.
1. Droid PositionCorellian Sector, Northwestern part, at the very edge, near taxi pad, point your view down, in the distance, near a taxi on another platform, is droid.
2. Droid PositionUpper Promenade, North area, right across the Galactic Solutions Industries.
3. Droid PositionDuros Sector, Eastern part, near taxi pad, at the top of one of the bridges in the air, from where two cables are hanging out.
4. Droid PositionNetwork Access, just bellow the taxi pad area, standing at one of the platforms bellow.
5. Droid PositionUpper Industrial Sector, Southeastern part, on top of the silos looking structure.
6. Droid PositionLower Industrial Sector, Southern part. From Upper Industrial Sector go to > Republic Research Division > System West Elevator > Lower Office Atrium > Upper Office Atrium > Systech East Elevator > Imperial Intelligence Gadget Warehouse > Lower Industrial Sector. Droid is on the top of the building with an elevator.
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.