Camry 2001 Transmission Shifter Cable broken?

Our 2001 with Auto Trans is now shifting without engaging as well. Was working well with some slight binding that got resolved with double-clicking the stick button and then it would easily engage. Now after parking it - it slides loosely but does not engage into any gear and remains only in park. Anyway to confirm that it is indeed the shifter cable (i.e is it visible from underneath?) ... before I get towed to dealer I'd like to be a little prepared for the possible techy spiel!?