The ECU for the 3.8L Turbo S engine is completely different that the 3.6L engine. If you want to hook up the RPM feed to the Traqmate for the 3.8L engine, use wire B56, gray with red tracer, from the bigger of the connectors on the ECU. (Unfortunately they are not labeled A and B)
To be sure, count the wires and when you get to number 56 it should be gray with red tracer. You have to unplug the connector to see the numbers and they only number the first and last wire in each row, you have to count the rest.
This wire gives you a single plug firing pulse, so set the number of cylinders to one and you can use this feed for both the TM and the ShiftI lights.
As far as I know, the wire will be the same on an S or a non-S engine.