There's much in this forum on this. Search Bowden Cable. This runs betweeen the internal handle assembly and the lock mechanism. It has a collar on its end that slips out of its seating. There's a good access LHD thread, with good pix at:
DIY - Removing front door window, subframe, door lock, handle, window regulator, etc.

As this question comes up often (and it hasn't yet happened on my '06MY) I've collected all the words of wisdom, video URLs, etc into a handy "cut out 'n keep" .doc file. PM me your e-mail address for a return with attach?