Have to agree that real advice will wait for you to post your make, model and correct year made to get exact idea.
On mine a"17" there is a 12 volt cigarette type outlet and right below it on the same plate a cable outlet to screw your antenna cable onto. Mine also has a tiny button and light to show the TV booster is turned on.
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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
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