My old Pace Arrow came with an extra wire for fog lights between battery control center and dash.
I added an on/off switch on dash, then added 30 amp cube relay in battery box. There was a fuse position on the board for the foglights. Ran new wire down to the LED lights. I mounted them near the grill area.
This position in the battery control center is hot when the ignition is on. The switch is used to turn off "daylight running" lamps when not needed.
Make sure the lights you choose are SAE rated for driving lights and not off road lamps.