Tach Signal, Follow Up

Vehicle Information: Model: Carrera; Year: 1996; Body Type: Coupe; Total Mileage: 58500;

Joel, In regards to your question on what type of shift light Im installing. Its a simple 3 wire shift light. Positive, Negative and the Tach signal wires. Model is Sparco SL-S2. Ive used this on my 996 and just connected the Tach/RPM wireon one of the OBD II wires, so Im hoping the same from the 993. Just not sure which wire(color or # it is).Thanks!