Kenne Bell sold them too.
I'd try the red and black to battery power FIRST, and see if the green LED lights up for power.
If that works, I believe the yellow wire goes to the ECM KR wire which is yellow with a black stripe on it, same as for any knock detector sensor lead.
I believe the white wire was for an external audible alert.
And it works well since it holds the lights on longer than most detectors 30-45 seconds.