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The right side of this photo is the gas generator combustor. The darker grey toward the left is the gas generator injector assembly at the forward end of the combustor; note the igniter port plug at right (with the red tag). The larger, almost square component is the gas generator injector fuel inlet tee housing (which is at far left, connected to the gas generator ball valve.

Although I'm uncertain what the line is just clockwise of the 9:00 position, I do have a detailed photo of it.

Also see my photos of the Rocket Center's F-1 rocket engine gas generator injector display.