OK those were helpful. If you have a harness similar to the pics of the red ones set up then the green wire is connecting to the brown hsv wire at the connector. This wire is the drive wire for the injector and will open and close the hsv based on a pwm. The pwm can be driven by an open channel on a fuel manager or by an fia2 from aquamist that replicates the IDC of one of your fuel injectors. Basically adding an fia2 would make your setup a 2d but you only need it if you don't have another load based injector driver available.
The red car should also probably be using a check valve as he will likely get some siphoning when the TB is closed and the manifold is under vaccuum.
The track pics make me miss my T/A.
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