MS3 Tach Output for shift light
 

I have a 96-97 MS3 PNP. My cluster rpm is off from Tuner Studio gauges. Would like MS to drive external sequential shift light for redline as opposed to cluster. What's the easiest way to get Tach out - options connector does not have tach out. If going to 4L on the factory harness, which tech output will the shift lights see the cluster or MS3? Thanks