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Detail of the interface between the S-II stage and the J-2 engines. Note the braided silver lines running into the stage (upper left, upper right, and on the center engine, leading into the cruciform beams forming center engine support assembly).

Picture 1 of 2.

Behind one beam is a LOX feed line (larger-diameter, corrugated, grey tube).

This picture is exposed for the lines outside the thrust structure.