I was concerned about that too, that's pretty small wire! My transformer only like 2 amps max so and I just used the meter's included wiring as GRJ did above. I don't have a crimp tool or any connectors to make up a new one. But that stuff is still on the want list!
Also, I have some breakers like GRJ used but in 2 amp flavor. Can't find them so that got left out for now, but I'll probably add it in when found.