Smartware won’t be able to do it, as it can only source from local drives (or Dropbox) if I remember correctly, with the MCM more normally being the destination than the source.
For the MCM dashboard, it will depend if the MB is plugged into the MCM or if it’s somewhere else (plugged into your router for example). If it’s directly connected to the USB port on the MCM, then a USB back-up on the dashboard is what you need (although there have been some reports of problems with that in the current firmware, but doing that has worked for me in the past on older firmware to populate a MyPassport plugged into my MCM, and also going the other way). I’m also not sure if you can schedule those, or if the current set-up is just for one-off’s (I know you can schedule internal back-ups, but the MCM can’t do those to USB connected drives).
If the MB is elsewhere on your network, then you’ll need a backup solution running on a PC on your network, which would of course be slower as it’s the man-in-the-middle (ie you have two network hops, one from MCM to PC and one from PC to MB). That would be a third-party piece of software, not a WD product.