Basically Jason you have Sub Channel numbers 1-16 to play with regardless of what type of cards you have. So to answer your question the first channel on the O/P Card in slot 2 will be O/P channel number 5. Of course the actual CM1 CobraNet Channel (Flyoff) number will depend on where you assign these bundle numbers within the Nionode/CM1 Device.
Advanced Channel Mapping for the Nionode CM1 works differently the TX Channels are 1-32 and the RX Channels are 1-32, if you remember Classic MM the RX Channels where 33-64 if i remember correctly......
BTW, remember to set the Number of Channels column in Transmitters accordingly to avoid transmitting needless channels on the Network.
Additional note - Sub Channel Mapping is not supported for CM1 Cab4n's but is for CM2 Cab4n's.
All energy flows according to the whims of the Great Magnet. What a fool I was to defy him.