Actually it needs a hole drilled into the center drain area, the sump where the floor drains are. It’s more complex than just punching the foam as the water just piles up with no where to go.
You CAN NOT just punch straight down as the floor is fiberglass and if you miss the drain, or vertical stringer edge, you will drain water into the foam chamber. There is no where for water to go except down should you mess up. That area is sealed now, and you should not break that seal. The boat will continue to suck up water until the chamber is filled with water and the foam sucks it up.