I’ve wrapped plenty of sensitive electronics that I’d be comfortable throwing at a wall. Get a larger box than you think you need, some foam wrapping/bubble wrap from another package and use that to form a protective core. Fill the rest of the box with lightly crumpled scrap paper, or packing peanuts if you have them. It ain’t rocket science.

You just have to assume in the first truck the package will sit underneath seven other heavy packages, while the second truck will be completely empty as your package rattles around and bangs against the walls. Anything else is foolishness, you know damn well those trucks aren’t individually fastening every box for a couple euros of gross revenue per delivery.