IKEA Godmorgon Cabinet - How to combine and attach?

... here is another picture that is very close to the planned one, only the open side is reversed once.

What is therefore the safest but also the most discreet method of attachment, so that you do not immediately see the angle (or whatever)?

....and why not have a stylish steel ski with about 8cm width on the open side) I did it like this here. Cost of the ski €50.- at the locksmith and you can stand on it afterward if you want. Below I used the same Ikea in gray. In my opinion, it looks stylish, you could even stick it to the wall without problems.

....and why not have a nice steel runner about 8cm wide on the open side) I did it like this here. Cost of the runner €50 at the locksmith and you can stand on it afterwards if you want. Below it, I have the same Ikea in grey. In my opinion, it looks nice, you could even stick it to the wall without any problems.

Do you perhaps have a picture of it so I can also visualize it visually?

Do you perhaps have a picture of it, so I can also visualize it?

Sorry, I had to carry out the piles of laundry and clean the whole bathroom especially because of you

sorry, had to carry out the piles of laundry and clean the whole bathroom especially for you

It was worth it!

It really looks nice, I just wanted something that isn’t supported on the floor.

Was worth it!

It really looks nice, I just wanted something that is not supported on the floor.

There are also runners in smaller sizes that can be screwed to the wall. Then you have support for the board and nothing on the floor.
If you google "regalträger unsichtbar," you will get other options. But I don’t know how stable those are. However, there are certainly stable options as well. The board needs to have a certain thickness for that.