From the looks of it I'd swear something already went HA-BANG in the meter socket... look at the left side load lug, looks burnt and I see spatter at the back of the can, not to mention there is that weird white film on the PoCo feeders and all that other burnt looking stuff in the bottom of the can.. Other than that WHAT was the person that installed the panel thinking? Wait let me take a stab at it... That #12 between the meter can and panel is going to act as a "cabinet heater" when under load to help prevent condensation from forming inside the enclosure??? Sound good?
The left load lug was definitely burned. Would have liked to have seen the origonal panel too, but it was removed before I got there...mabe the insurance co has it.