Just turn OFF the amplifier in the cabinet to the right of the TV, it should have a green LED that's lit when the antenna amplifier is on. Typically just a red pushbutton to turn it on and off.
You do NOT have to swap any cables around, the amplifier does that when you turn it off.
But isn't that assuming there is already a wire going from the cable input (inside the cabinet) to the TV? Mine has no wire attached.
Peg
The wire going to the TV and the wire going to the antenna and the wire going to the cable input are ALL behind the cover of the amplifier.
The cable connector outside on the amplifier cover is used if you had a device (like a satellite receiver) that used a coax output. That presumes you have the amplifier cover that's white and has a single coax connector on the front.
If you have the Sensar amplifier, you push the selector button until the PARK CABLE line is selected.
There are NO cables you need to switch. Just push the button to turn the amplifier OFF and the system magically does the rest all by itself.
Don