Store Mount Blade How Do You Mount A Store-bought Skateboard Ramp?

How do you mount a store-bought skateboard ramp? - store mount blade

My son has a small skate ramp for Christmas. He came mounted with four screws. The problem is that it is not obvious screw it in concrete.

If you screw the plywood, then you will find something better about how they skate on and off the plywood should. You can board the size of the general admission.

We are certainly not the first to ask what they do with this little ramp. Suggestions?