See video...
Beside losing my phone

I squeezed a almost half a gallon of water out of this thick piece of floorliner, and let it dry for 2 weeks:
Not to mention I had to pull out front seats, handrest, whole middle console and a lot of plastic all around. Took me 5 hours to took apart and vacuum clean interior.
2 weeks later I cleaned interior again with rubbing alcohol and examined floor for any additional holes, which let water in. Found 3 open holes in middle section (red) and one under front right floor carpet, just where passenger's feet would be.
Trimmed some round plastic pieces and with some silicone kit transformed holes into no-holes-anymore.
I also decided to buy a proper gun for silicon kit tube, as pushing it with hammer obviously is a no-go

As I had a roll of soundproofing self-adhesive handy, I added some strips on metal areas to silence vehicle for one or two dBm. I am not sure if I've done it properly, nor if there's any good of doing so...but who cares, I feel good

Also I had handy some dielectric grease, so I protected all connectors to prevent possible further water damage (if I soak it again...which I probably will

It's been 7 hours since today's start of assembly and my Patthy is now nice and shiny, clean as new and I am sure it is not so noisy either: