You need to remove the wall (partition) to the right of the fridge. This will probably involve removing the end table next to it. Once it is removed, you'll find a 4-5" piece of right angle aluminum screwed to the floor and to the right side of the fridge. (You can't get to it without removing the wall.)
I've removed one from a '72 Overlander and a '73 Sovereign
and that is all that holds it (there's also one attached to the exterior wall....forgot about that one....just remembered...it's been a while)
Unless someone else has replaced it, there aren't any other bolts in the floor, frame crossmembers, etc.
It's kind of a pain but you can't fight it. Like most A/S stuff, you have to remove at least 3 items to get to the thing you want. Here's a pic
with the wall and fridge removed.