When I was thinking about how I could make this, I was thinking, what should I in case the open wires in? Then I thought, epoxy putty! Epoxy putty is just like jb weld or five minute epoxy, except it is black and it comes in a putty form. It is almost indestructible. So that is why I used it!
Step 1: Materials
-epoxy putty or sugru (sugru would make a better factory look, epoxy would just be tough)
-plaster of paris
-soldering iron or wire glue
-a scrap of sandpaper