Bench Seat Replaced with buckets. Brackets/supports needed?

Bronze Barracuda said
Hoping someone has some information or pictures?
My 68 Barracuda originally came with a bench seat, one of the previous owners replaced it with buckets. On the drivers side, the rear right bolt seems to have broken (for lack of a better word) the floorboard. I took some pictuers from above and underneath. It looks as though the floorboard actually cracked or split right under the rear bolt. I am wondering if the bucket seats had extra supports on the floorboards? The floorboard in this area has no real visible rust. Seems like even if I weld it, it might just split again.
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Just like cudascott showed, you need the reinforcement plates and it looks like the seat bolt hole is wobbled out and possibly loose at some point. I would weld up the crack completely and reinforce it along with the seat mount area. That's a pretty mean split.