They fit right into the front cross brace. They have magnets as well as brackets on the sides. They work on a motion sensor so you just connect them all to a transformer. Just look at it when you are at IKEA and ask the kitchen sales person. It's pretty easy.

Drawer lights? Why on earth would one need such? My drawers are full-extension and I have good enough lighting in my kitchen to see what's in my drawers (and I have a LOT of drawers!).