@rajapruk I'm looking at the pic trying to figure out what you mean by the inside of the screw-connectors. I oriented the speaker cables to go out the back of the NC400 in parallel with the power and input cable. Because the screw itself was in the way, I had to choose whether to offset them towards power or input, and I chose input.
The way Bruno recommends is actually one cable going one way, the other the opposite way - toward each other. That way the "unbalanced" area (that acts as an antenna) is minimized.