The directions regarding "connect input to channel A" is referring to your INPUT from your pre-amp. Connect the input from your pre-amp to the channel-A input on each of the two mono amps. Do not use the channel - B input on either of the amps.
You might want to try to reach out to AudiogoN user rwwear. He had a post from a few years ago saying he had a pair of CC-2's he sometimes ran in mono.
You might want to try to reach out to AudiogoN user rwwear. He had a post from a few years ago saying he had a pair of CC-2's he sometimes ran in mono.