Some more info thanks to flightblogger –

Aft Fuselage (Section 47/48) now moved into position for attachment to the center fuselage on the morning of June 1.
– Wiring and hydraulics are being installed in earnest.
– Interesting nomenclature changes for the line. (see site for details)
– Northwest and ANA will get the refurbished test frames.
– Tail cone is being moved shortly into position for attachment behind the horizontal stabilizer.
– Wings are completing pre-integration and are being moved into final assembly position 1 for attachment to the wing box and fuselage as early as June 3.
– System software v. 6.5 currently being tested. 6.7 to follow shortly.