As you can’t boot the laptop using the eMMc anymore, you’ll need to create a bootable Win 10 USB device.
Microsoft provide a tool for this which you can download here:
https://www.microsoft.com/en-us/software-download/windows10
Run the tool and after selecting the USB stick you want to use it will automatically download the latest Win 10 installation files to the USB and make it bootable. then just boot the Ezbook with the usb and install windows on your ssd.
I don’t think the ssd will show up in the boot order options in the bios until it has a bootable partition on there.
I’m in the same boat as you (Need to do fresh install of Win 10) but for different reasons.
