I couldn't really see where the wires are connected to and yes there is only one harness that connects to the box. I took my car to Jiffy Lube for an oil change and one of the guys working there told me that the box is a computer for the car. He also told me that I could take the box to a Honda dealer and get it analyzed. After market computer add-on? It doesn't look like my car has had any engine upgrades so whats the point... I'm confused.