Third and second row seat removal + Smell in car after it rains

[Eieio23]

Hi guys, does anyone have a DIY on how to remove the third and second row seats?

I need to remove them as I think I have a leak somewhere under the carpets.

I did have a hole in the rear vapor barrier causing water to leak into the carpet but has since been fixed. However every time it rains the car has a bad odor.

I have also checked the rear cargo pillars, tailgate grommets, sunroof drains, there are no leaks or dampness in the car. The only other thing I can think of is something under the thick foam carpets, like washer jets?

Any help would be appreciated.

Thanks