The next functional unit are the characteristic hydraulic lines on Side 4. Here is an unorthodox view from below.
The Twist. The hydraulic lines first run parallel to the LOX lines at Side 3 up to Level 30, where they then take a 90° turn to Side 4 ...
... as also visible here.
Some things only become clear to you in 3D - for example, why the top horizontal bar of the hydraulic lines support rack is a little wider in every segment than the others. The support frame has to clear the diagonal column located immediately behind in this section.