Entering Exo-Lab 729
To enter Exo Lab 729 a scientist first has to scan some consoles in the Ancient Tower (shown on the map and place where you do part of the main quest). After you do that head north to Exo-Lab 729 entrance and you will now be able to interact with three consoles. Once you manage to turn all three of them on you will b e able to interact with a door switch, which will take you inside the second room of Exo Lab 729. Datacube is inside that room.
Scientists can scan consoles inside the ancient Tower (see the little blue icons over the consoles? That means you can scan them).
Aviel: Order of the Weavers
By extracting pure primal air from loftite crystals, the tower below is able to generate wildly different meteorological effects. Currently the machine is generating a storm, but it could just as easily create destructive bolts of lightning, or a whirlwind of such power it would tear this facility apart. What a sight that would make…