I have a 2018 LX, which has very few amenities, but my wife loves the seats (hates leather), so I am now faced with trying to upgrade a few things. I've changed the headlights, backup lights and interior lights to LED, which makes a big difference. Now I would like to add the passenger side sun visor so that there is a vanity mirror and light. Are the wiring harness connections under the headliner? I changed the mirrors on my old Altima (from plain to lighted) and the fittings were there, making it "plug and play".