Can anyone explain why the 013-0099-02 FET adapter only has 5 pins on the back while the 013-0099-00 has 6 pins? Looking for instructions and cannot find them. I cannot make the right side of -02 work on my 576 or 577. While -00 connects to all 6 jacks of the tracer; the 02 does not connect the right side of the adapter (S - source) to the right side emitter jack of the curve tracer. Please help my feeble mind understand. What am I missing?