I'm putting two Victron Multiples in parallel. I ordered some 6/2 Romex. Both wires run through a in wall main breaker with each hot going through one pole of a 2-pole 50 amp cfgi fuse. I just realized since the wires are Romex if I strip the outer insulation off in the box the wires may touch. Should I get 6/2 with a shelthed ground cable or use individual conductors so the 2 ground wires don't touch. Not that it inherently matters if they touches their ground wires. I just wanted to be safe. The wires will terminate in the sub panel on duel lugs. Thanks in advance for your help.