Looks a lot like like tail tipping to me, although that's more a freighter/combi thing..
A380 prone to tailtipping?
It's probably just the compression of the gear with fuel, cargo and pax going on. The A380 isn't that high off the ground to start with. It looks like the truck is too far forward.
There are about five panels in that area. Some are potable water, fuelling control and vacuum toilet panels. I don't know what the two large ones are for.