What are these for?

[scullyg40]

Who can tell me what's the function of these plates? As there spotwelded in pretty good.

 

[gez 172]

Aren’t they strengthening plates for the shell?

Theyre around the seatbelt holes, to make it stronger.

 

[scullyg40]

So their function is to create a strong area around the seatbelts in case of an impact?

 

[bloke]

Isofix bar or seat backs fwir? Couple more holes in line with them.

 

[scullyg40]

I think it was the Isofix bar, because if I remember correct, one of the bolts snapped when I removed the Isofix bar. As I don't have back seats or an Isofix bar anymore, that means the plates can go.
If someone thinks they have a structural function, please comment.