Wiring path underneath for hitch wiring harness

Hello, I just installed a hitch on my 2019 Tuscon and have completed the install of the trailer wiring harness except running the 12V power lead from the rear of the car to the battery. I can't find a easy path to run the wire underneath the car from the harness controller to the battery.
If anyone out there can tell me an easy path to run the wire I would appreciate it. The harness controller is located on the driver rear side.

Thanks in advance.
The duck

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