I have 2 R1s in my power supply but just my digital source components are plugged into it. My power supply has shielded NEP-3001 going into it.
As far as shielded/unshielded depends on your environment and what you're plugging into the power supply. Possible it may not matter.
Also, shield on shielded power cables has to connect to one of the connectors so you will have to unbraid it and twist into a wire to connect to ground (if I remember correctly the male connector, floating on female end). Some cables have a shield drain wire which makes it easier but should not be connected at both ends.
Caveat: Hope this helps BUT I am no expert, please consult other sources before building your PC.
As far as shielded/unshielded depends on your environment and what you're plugging into the power supply. Possible it may not matter.
Also, shield on shielded power cables has to connect to one of the connectors so you will have to unbraid it and twist into a wire to connect to ground (if I remember correctly the male connector, floating on female end). Some cables have a shield drain wire which makes it easier but should not be connected at both ends.
Caveat: Hope this helps BUT I am no expert, please consult other sources before building your PC.