At the time of purchase I asked for mine be fitted with clamps. This made is very easy to attach to anything (bare wire, spade, even directly to speaker terminals). Just make sure that the clamps don't inadvertently touch each other :).
I have tried them in more configurations since original post. I maintain that they do make a difference, but admittedly I did not have enough patience to wait for them to reach the supposed steady state each time. As such, I'm still not convinced that I like what they do. YMMV.
