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Overall walk-around of the "customer connect fluid system," the pneumatic interface to the stage. These lines include fuel and oxidizer tank pressurization lines; start tank fill, drain, vent, and relief lines; turbopump and thrust chamber jacket purges; and a helium tank fill line.

Picture 3 of 3.

The red framework and line plate appear to be ground support equipment, as nothing similar appears on the S-II stage.