Better option than cut and splice, is to get a pin release tool, to allow you to reuse the stock wires and pins in a new connector housing. These tools are sold as a 3-pack, I think I paid about 9 or 10 bucks from jeg's a while back.
Tool and bare wire with pin:
pin inserted into tool, almost to the point where locking tabs are depressed.
Obviously you can't see this when the connector is assembled -- but the process is the same.