Bar counter help needed

So I'm aiming for a small bar counter thats like 120cm x 65cm. Using it as a kitchen counter on one side and dining table on the other since i need both and my apartment only has room for one of them normally and I need a place to eat other then my desk. The image is the inspiration I found. Would use a KNOXHULT for it and mount one side to the wall. The CAPITA used in the inspiration doesn't exist in this way but are pretty easily optainable second hand. My problem here is the backside of the knoxhult. It's pretty ugly per default and I don't know what I should mount to the backside. Theres not much to work with since theres only the wall mounting stuff and the small wooden plate but can't really do anything with that. Would love to hear your ideas.