Set the panel to match the Clamp Release Procedure document. You can set things in any order. When everything is right, the green RELEASE button flashes. Press it, then go downstairs and turn the red crank.

Where it is

It's the panel opposite the Remote Systems panel in the SWDP – Different Control Room (Part 6, Chapter 15). It's the last puzzle before the final boss.

Settings

ControlSetting
Balance (left and right)Intermediate
Notify (Self and All)On
Run OffDisengaged
Clamp ConnectionD71 (the number in front of you)
ReportSwitches 1, 3 and 6 on (yellow light)
Pressure ControlSet (bottom)
Intubate FlowNone (bottom)
Battery OneB (up)
Battery TwoC (right)

Make a manual save at the red crank: call 100 from a phone. Guides use it to get the Sci-fi, Dog and Justice endings by reloading, instead of doing another full playthrough.

Finishing the release despawns the enemies in the area. If you're keeping your kill count low, do this before you explore.

Related puzzles