The whole thing is out of ¼ Black Plexiglas.
It is held together with glue. I don't work with any woods normally. Just plastics.
The top piece will be left unfastened so you can choose what way you prefer to fasten it. And the front is precut to fit the sled and there is a smaller opening in the back that will come with another piece of black plastic for covering it. That hole is in case you want to put jacks in it or whatever. You can leave it open if you like and just run the sled wires out of it.