The shelf on which the Holiday Shelf layout will be installed is a L shaped shelf that surrounds the landing on the way up to my second floor.  It is more or less at second floor level.  The stiff you see on the left side is structures and the trolley that have arrived and are awaiting installation.

The shelf on the left side of the L is deeper than the shelf on the right side.  There is also a 120 V AC outlet conveniently located just above the shelf.

The shelf to the right extends to the hallway for the second floor.