I like these
http://www.amazon.com/Moeller-Marine...6XGV7GG770KH7R
As far as mounting it, I guess you could screw it and glue it. That's probably what I would do rather than pulling the hatch and trying to thru-bolt it. Drill a hole and dig out some core if possible, fill with epoxy then re-drill and screw it to the epoxy plug. I would probably make a few globs of 5200 around the screw holes and maybe another in the middle to insure it stays put.
Maybe someone has a better idea for mounting it.