Best way to get these square nuts out to pull my front bench seat?

[tonyp25]

Is there anything under the vehicle I also need to take out? Any tools designed for it or am I just going to scratch this all up with a pair of pliers? It seems like there a rubber gaskets on the bottom of the car that maybe pop out to expose a bolt. Just having trouble getting them off.

 

[RR Fan Dan]

I don’t believe those are nuts. I think you need to access the bolts from the other side.

 

[WileE]

Hello... you unbolt it from underneath unfastening the bolts.

 

[70 sublime]

I believe those squares you can see will be fastened to the seat frame as in welded or snapped into the hole of the seat frame
They should not come off

 

[RemCharger]

Looks like a ford of some sort. And yes those are access plugs for the bolts