The typical Honda way to do that stuff is one side of the solenoid is powered from the main relay at all times. The other wire goes to the ECU, which grounds it when it wants to energize the solenoid.

Go to acuraparts247.com or someplace like that, put in the car's information. I guess that would be a '98 Integra GSR since that's where the engine came from. Select intake manifold or something like that for a parts drawing. I'm pretty sure one of those parts drawings shows the IAB vacuum hoses.