If you have an enclosed underbelly get some Gorrilla tape or Etearnabond tape. Cut a flap type hole leaving the remaining edge forward and tape it up when done. Also, make sure to avoid LP, water, wires and structural parts. I did something similar by drill a 1/8 inch hole down then finding from below. Slow and easy, stop if you hit anything. Caulked from below and above to avoid visitors.
2017 SLX 195RB
2021 Jeep Grand Cherokee Summit L 5.7L V8
Andersen WDH hitch, Renogy 100 AH Lithium &
200 Watts solar panels from Renogy
Prev. '14 Jeep Grand Cherokee Overland, gas 3.6 V6