That’s not what the manual says (that says you FIRST have to install the v1.12 firmware before connecting the new modules), but it works and that is what counts
For who needs to do this as well, these are the steps:
download latest firmware (at the bottom of the page) to a USB flash drive
Insert the USB flash drive into your Snapmaker (in the controller, last plug at the bottom)
Turn on the machine
Swipe left on the Touchscreen > Tap Files > Tap USB > Tap the firmware file to update.
While it is loading the firmware update, it will show there are updates loaded for modules. And that is what you need!