In 2015 me and my wife got IKEA Besta unit for our living room decoration and organization. Very satisfied but got a bit disappointed when the IKEA technician refused to install the IKEA Omlopp spotlights that i had bought and paid to get them installed. Never mind, because google is our best friend.
Yesterday i have stumbled upon a nice IKEA hack uploaded by "robandwend" on ikeahackers.net . He managed to install the spotlights without unmounting Besta parts from the wall. No cables visible, pure success, so i have to share it with you.
Follow the photo gallery steps or enter the source project on the website provided above in order not to lose a single point on it. Good luck !