Marked locations on the map are the areas from where you can spot MCR-99 Droids. There are two different starting MCR-99 Droid positions, for Republic and Empire each.
1.E(mpire) Droid PositionIncorporation Islands, Western part, from taxi pad, point your view toward the north, specifically on a pipe coming out from building wall.
1.R(epublic) Droid PositionBlastfield Shipyards, Northeastern part, bellow the crashed spaceship.
2. Droid PositionLabor Valley, Northern part, in the air, close to train track.
3. Droid PositionLabor Valley, west from Republic Base, behind the signs at the top of the building.
4. Droid PositionLabor Valley, Southwestern part, at the top of the corner of wrecked building.
5. Droid PositionAxial Park, Southeastern part, inside a tunnel that connects two buildings.
6. Droid PositionGovernment District, Western part, inside a huge building crack part.
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.