Cadbury Caramilk Secret (idea)

They build them right-side-up. Start with a flat chocolate base, then place a frozen chunk of the caramel in the middle of it, then put an open-topped mold over top and pour on the molten chocolate. The molten chocolate will slowly thaw the caramel out, and the frozen caramel will speed up the solidification of the chocolate. The Cadbury label can be stamped on shortly after.

Using the legend from the post above:

1.

   #######

2.
     ***
   #######

3.  /   \
   / *** \
   #######

4.  /...\
   /.***.\
   #######

5.  /###\
   /#***#\
   #######

And that is my theory on how they get the caramel into Cadbury's Caramilk Candy.