Hi,

I talked with the factory to verify the wire lengths, and yes they come with connectors on , not anything elaborate for connectors just flat blade 1/4" crimpers. Instructions are in bold not to shorten the 12' wires or the circuit breaker will trip sooner. I even asked about other brands of circuit breakers, I would of liked to keep all the same , but they recommend only the breaker they supply. So I followed directions with the hope of trouble free use