Hi lars
I'm not 100% sure on this but I think this is how it's routed/wired up..
The first blue/yellow wire from the engine harness blue plug is the signal feed from the starter solenoid connection to the by pass resistor relay.
The second blue/yellow wire is from the ignition harness yellow plug. This goes to pin 85 of the by pass resistor relay.
Cause these are on 2 different looms, the blue/yellow signal wire from the starter is joined to the second blue/yellow wire so it can give the signal feed for by passing one half of the resistor during cranking.
The last remaining blue /yellow wire goes from the by pass relay to the ballast resistor top left connection.
Please correct me if my thinking is wrong here..
Shane