Failed toilet holding down bolts

[New boat]

Has anyone had a problem with the four bots which hold the toilet down to the toilet platform?
Just discovered that the two outboard bolts on my 2009 Bav 31 were completely loose and when I pulled them out found they were corroded through about 1 inch from the bolt head.

Anyone know how the bolts are secured, are they tapped into a metal plate within the platform or are they through bolted or are they simply tapped into the fibreglass? Very difficult to gain access to the nuts if they are through bolted.

[Anthony]

I'm sure they are just screws tapped into the fibreglass, which is what I have found. I suspect a non marine grade stainless steel has been used so you should replace with top marine grade stainless screws and put a squirt of Sikaflex into the holes on re-assembly to stop any leakages going to the bilge area below.