Passenger seat- welded nut broke free

Removed passenger seat on 2017 Tundra TRD Pro to wire some audio. I was re-installing the seats and the welded nut that the seat bolt screws into seems to have broken free from the floor frame under the vehicle. Bolt is still attached loosely and now spins freely but I can’t access the nut from below the truck. Any ways around this other than a hole saw to the floor frame?

And before you have to ask, Yes! The bolt seemed to be stuck so I tried to muscle it through which was a bonehead move. Another lesson learned but I’m still in hopes I can resolve this without too much of a mess. Thanks in advance.

 

Pictures?

 

Lots of options, without seeing I can't say for sure. That said I think I would try to drill a small hole next to it and fill the cavity with epoxy via a pretty big syringe type injector.

 

That was what I was thinking as well. Use something to secure the bolt so that it could be tightened down. I just was not clear about the situation without pictures.