You should just be able to use this and adapt it to your needs.

The wires are extremely easy to remove from the connector housing. Just using a pointy object and press down on the metal wings in the back, then pull on the wire. They will slide out of the housing. You can essentially combine the connectors from 2 of the wires to make the one you need. Here is a photo of what it looks like before it is inserted.

As an alternative, I wrote a guide on how to DIY these connectors for 3D Printers. Not really worth it for a single cable, but when you are doing it frequently it comes in extremely handy. I addressed the whole "rearranging the wires" at the bottom, although I should probably add a picture there for clarity.