Bruce,
I am not sure exactly what is your question. The rack looks exactly like what is left on your current adult bike when you remove the Piccolo: There is the rack with 2 or 3 sets of struts to attach it to the seatstays (the different sets are needed because shorter struts are used with large frames and longer struts with small ones). The rack also has the threaded part in the middle (like a nut) which is the receiving end of the trailercycle hitch.
They made one slight improvement over the last 3 years: the new rack has a small tab welded in the rear, with 2 holes at 2 cm apart (from memory) to attach a light like the Vistalite Super Nebula or a reflector.
Regards,