Return to the prison corridor and take the other door. Here, a SkaarjWarrior guards two switches on the wall and a Stinger on a table. Kill the Skaarjwarrior and collect the Stinger, plus Tarydium Shards from barrels in the corner. Press the two switches to open the prison cells.
Return to the prison corridor ring and explore the cells; I do this clockwise. Note: some of the cells might contain Tentacles on the ceiling. This is generated at random, so I can't tell you which. Just have your Automag at the ready.
Going clockwise: the first cell is the one you came in by. Nothing new to see. Opposite, a Nali stands in a typical catatonic state. Further along, the third cell contains bandages and a human corpse.
"I must try to find a way out of this place. The lizard men in charge here are strangely barbaric given the technological advancement implied by their weapons. It may be harder to fool them than I first thought, but I must make the attempt."
Looks like she failed. The opposite cell contains a clip and another human corpse.
"If I am to die in this place, it pleases my mind that some of my former captors are here with me. Tomorrow I will find my own peace in death knowing that they have all suffered before me."
She must have been a prisoner on the Vortex Rikers. Continuing clockwise to the other side of the prison corridor ring, the fifth cell contains yet another human corpse.
"I'm so hungry. I hope that the others in the scouting part from the ISV Kran will find me. This is the only hope that keeps me going from day to day. Without that to cling to I'd be insane by now. I can't stand the screams of pain much longer."
ISV Kran? A log mentioned that ship back at NyLeve's falls. Maybe you'll get to see it later. Anyway, continuing to the cell opposite, one more human corpse's log simply says:
"I wish I had died when the Vortex Rikers crashed. I do not know what is to become of me. I am scared."
The seventh cell contains another catatonic Nali and a useful Shield Belt. Opposite, the final cell contains Bandages and a dead Nali.
"The Skaarj have brought in a new batch of the two-armed softskins from another of their raids. I fear that one of them is the Messiah, come down from the heavens, but I must pray that I am mistaken and not give up hope for the freedom of my people."
More talk about the Messiah... anyway, that detour complete, return to the room where the two switches were (it should be the first door clockwise from here), and go through the door on the side wall. There is a flight of steps beyond, but before going up, open the crates in the shadow in the far corner to get a Health Pack and two Clips. Climb the steps and pass through the door at the top; you will be in the foyer inside the main entrance.