Cut greenwire with orange stripe on the coil. This is the VCC for the coil. Attach the red with green stripe TOWARDS the COIL. Attach the solid red wire towards the POWER DISTRIBUTION. THe black is ground, I like to attach it tot he battery cable. THe grey is your tach signal. You can tie wrap the unit to the hoses and vacuum lines on the side of the battery tray. If you dont have a soldering iron, then you should not be purchasing this item.