Installations like this bring to mind the old ceremonies for drumming a disgraced officer out of the corps....
I can see it now:
Assembled in the town square, neatly lined up, are all the AHJ's, Licensed Contractors, Journeymen .... and, with the best view, the apprentices.
The accused is paraded forth. His Carhartt's are removed, to be replaced by some poly-cotton jumpsuit. His electrical tools are, one by one, dropped into a vat of molten metal. His hands are liberally coated with Gorilla Glue, then inserted into his pockets. Finally, his hard hat is replaced with a funnel.
Then the disgraced is taken to a soup kitchen, nearest the bus station. Good Riddance.
I'd guess the red and black go to the permanent panel inside the house; when the temp is no longer needed, this panel will be removed and the red and black lines will be pulled into the meter can. They are taped up so they won't accidentally touch anything. The GFCI is connected to the lone 20A breaker and to the ground bar (with both ground and neutral in the same hole). The 12ga back to the meter is the main fuse; the 200A breaker is just the disconnect :-)