Well, with the aid of http://www.synthzone.com/midi/technics/kn7000/SXKN7000%20Service.pdf and the removal of 17 screws from the bottom of the KN7000 the upper part lifted partially off sufficiently for me to retrieve the errant business card and return all the screws with shaky hands lest I had one over...chuckle.
But no there was a hole for every screw and the keyboard is working normally now.