Tub housekeeping

After several drives I noticed that a lot of the noise came from the back of the rover where the aluminum was bare.  Its time to clean and herculine the interior. I pulled the galvanized sheet of steel from the front of the tub and found some holes.
I'm guessing the DSPO at hunting camp didn't want to mess with the gas tank so he mounted a gas tank and ?? in the tub. Note the square area.

Its a little yucky back there.  I found a burnt wire coming through the floorboardon the right side of the dirty area. 
What it was for? I dunno.  The large holes are about 2 x 2.5" and another about 1" diameter.  Why? I dunno still.

OOH- SHINY!

The seat belt mounting bolts finally gave up and came out.  They were harder to get out on the left side than the right side for some reason.  The rivets are bad bad bad. I'm rying to preserve the wiring by missing them with the grinder :)

A couple tub side supports came loose when removing the bolts.  The rivets corroded into and the brackets are loose.  I'm getting new  rivets put in so the seatbelts can mount securely. Even if they are never used.