1. Droid PositionEastern Ice Shelf, Southeast from Republic Base Camp, between two large rocks.
2. Droid PositionEastern Ice Shelf, Northwest from Imperial Base Camp, at the top of the thin rock.
3. Droid PositionEastern Ice Shelf, at the top of the structure above entrance which leads to seeker droid group mission area.
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.