Unfortunately, there is no way to attach the product to the wall.
I attached it to the wall myself, I pushed both ends against the wall for up to 2 months and it worked well. After that I only used it as a room barrier so that it was not possible to pass through a certain door.
You just have to buy a hinge and drill holes.
Another option is to form a circle and attach it with a rope at the top and bottom, but then it is extremely small, so it is really only suitable for very small dogs. Otherwise it would have to be a bit bigger.
Unfortunately, the parcel has still not arrived. I ordered it on 10 MAY. As I read, it cannot be customised. That's completely ok for me as I can use it flexibly.