Someone has taken a pic
http://www.chambonino.com/routework/routewk12d.jpg
The speaker leads enter between number 2 and 3 white pillared W/W resistors,
calling number 1 at the foreground. The underside metalwork is 1/2 inch
below the pcb but somehow the strain relief clamp is inserted in that gap
surrounded by the h/s and Tx underside metal etc