I assume you have the schematics for the wire loom?
The orange and green wire are pre-wired to ignition drivers, ok - use those if you wish. The remaingin four 0.75 mm² wires are not connected, you already figured out "nc" means "not connected" ? Just look at the EC36 end of the harness, they are there.
The 1.5 mm² red-black wires are +12V fused for ignition coils and according to the schematic go to connector X4 which is the relay harness.
It's all up to you if you want to use different ignition drivers than what's pre-wired to the EC36, or whatever. The orange and green wires are not the only ones you can use - just put them in the proper place for what you want. You have to set it up in VemsTune in the ignition table properly either way. Just because it's pre-wired doesn't mean that the software is set up to use them.