The top line coming from the white round plastic item is the Vacuum Control Valve, not that. Just below is the shut off actuator, there is a black rubber connector, it's bent over, but visible. That fits on a brown hard line that goes to the ignition.
Here's a view from lower down, the VCV is just above, you can see the brown hard line going to the black rubber connector and its proximity to the oil filter canister.

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83 SD

84 CD