The tower remained, as expected, perfectly still. There was a sign of an activity inside, though: a positioning light blinking red on the top of it. Apparently, their connection to extranet was active right now. As for the entry points, it had none, but a low, singe-store building standing next to it had a new airlock installed - as new as the thick bundle of cables connection one of the walls to the comm array proper. Apparently, there was someone inside.
As for the mechs... well, figuring out their patrol routes was hardly difficult task. A pair of them passed next to the tower every ten minutes, then stood frozen in one place for a minute or so before continuing. You could not tell if the pair was one and the same every time, or if they were separate patrols... not from the distance, anyway.
And then, all of the sudden, the airlock swirled open, releasing a single man outside - guessing by his stature, either human or batarian. It was impossible to tell for certain, given that he was wearing a light full-body suit. For a moment, you tensed, fearing detection, but the man paid no attention the wreck you were hiding in, instead just turning towards the crater and starting a descent to the main base.