Sub Floor in Rod Box?

[BrettL]

Fellas… I’ve created a setup to feed my front units off of a separate battery. I have a 2020 Nitro Z20. Location of this work is in the starboard front rod box. I’ve mounted what I need to mount on the wall towards the center of the boat, but I really need to put one screw in the floor of the rod box. I’m not sure if there is a sub floor in that location, or a space if you will, between floor of rod box and bottom of the boat? Of course I will NOT drill, or put a screw there at all until I am POSITIVE I won’t go all the way through! Does anyone know?? Thanks