I'm planning on changing the light fixtures in my ceilings to LED ones. The ceiling rose looks quite simple (nothing in the loop, just single Live, Earth, and Neutral wires). Once I've turned the power off, how do I use a multimeter to confirm there is no power in the wires? Where do I connect each prod? There's not much in the manual, but I'm thinking I set the multimeter dial to V~(AC) 600v. Where do I put the red and black prods to verify there's no power in the light mains? I've looked online for video demos, but no luck. Pictures attached. Thanks!