that is NOT correct and I would not be taking wiring advice from anyone who is telling you that.
The stock IVR (Instrument Voltage Regulator) in a ralley gauge cluster is built into the Fuel gauge. The fuel gauge has 3 posts, one for 12V input, one for the sender and one to OUTPUT approximately 5-6 V for the Temp and Oil gauges
The stock IVR works like a blinker, it has a bimetal strip inside and a heating coil. As the heating coil gets hot it disconnects the output of the IVR so the output voltage goes to 0V. As the heating coil cools the contacts reconnect it sends 12V to the output. this happens at a frequency - on off on off - creating a square wave that averages about 5-6 volts. Because the gauges are electro mechanical they don't care that the voltage is turning on and off.
Chrysler Master Tech Video that explains it in detail.
As for the "Kwik Wire" harness, I assume it is not a stock replacement harness so you will have to defer to their "wisdom" as to how to hook it up.
TYPICALLY when the IVR fails in a ralley cluster an external IVR is added (BUT the internal IVR in the FUEL gauge MUST be disabled) RT-Eng makes a really good IVR and have instructions on how to disable the IVR in the Fuel Gauge