Thanks

How about the PCI-E connectors? Does it not matter that they are off one cable?
It's best to use two because it will reduce the heat in the cables less chance of a fire hazard. However if you keep the miner and psu cool you should be fine.
One cable should certainly not be used. You need to use at least two, however four is best to prevent them from getting too warm. (although two should realistically not be an issue)