That connection is so wrong in so many ways it's scary..
how a company could sell something like this that could not only (if lucky) stop working if one contact came loos, but could short circuit, burn or even start a fire is unreal
serious bad bad bad way.
this is how it should be done, check out exclusive snakes web site, they have a how to wire the THG tape properly.. included a few pictures to help out..
it's surprizing they don't but off the plug too and tell people to just stick the wires in the outlets ???? it's the stupidest thing I've seen a company do as far as safety goes..