Rick 1164

Hi guys and girls. Picked up a 2015 A4 S line Black edition plus yesterday. Unfortunately it doesn't come with the puddle lights, just reflectors. One of the guys at work has a Q3 and said to John the forum as he's fitted them to his following a tutorial on here. I've searched all over and I can't find it. Is anyone able to shed any light on exactly how to do it and which kit to get please? Audi want around £600 to fit but he's mentioned a kit at a fraction of the price. Thanks in advance