Bilge Pump installation question

[jorgeinmiami]

I'm going to install the 2 bilge pumps today .
My plan is to 5200 to the bilge housing and glue it to the hull directly.

I would like to also screw it down also.

What size screws would I be use?
I know that the bottom hull has some thickness to it but I don't want to make a mistake.

[dirtwheelsfl]

52million is all ya need! Done tons of em that way and never had a problem..