How to Find the Mandibular Rearranger
To obtain the Mandibular Rearranger, you will firstly need to make your way to Gladys on the Groundbreaker. Trade with her and purchase the Hephaestus Mining – Archive Cartridge.
In order to get your clue, access the cartridge via the terminal in your ships quarters. Now that you have unlocked the clue, start heading to Scylla.
Once you have arrived, follow the quest marker until you reach a small building in the Northern corner of the map. Inside this building, you will find a blue/green box the ground that contains the Mandibular Rearranger.