The cord of the Replacement Wiring Harness for Tow Ready Nissan Vehicle Wiring Harness # 118267 measures 40 inches, and the overall length including the plug is 42-3/4 inches.
In regards to your 2019 Infiniti QX60, the 7-way wiring harness is the T-One Vehicle Wiring Harness for Factory Tow Package - 7-Way Trailer Connector # 118273.
For a hitch the best option is the Draw-Tite Max-Frame Trailer Hitch Receiver # 76031.
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