Go to figma, click on the share button and copy the URL inside the src attribute of the embed code provided by figma.
Now go to the component config file for which you want the figma embed to be included.
Add a meta object, if not already present, in which case you can just update it with a figma property for the variant you want to see it included in. This can be done for the component and all its variants by defining it for the base component, or on a per variant basis, like so:
meta: {
figma: "https://www.figma.com/embed?embed_host=share&url=https%3A%2F%2Fwww.figma.com%2Ffile%2F3W76LPb0Deg81NmQ8bbb08%2FSDS---Web%3Ftype%3Ddesign%26node-id%3D3469%253A54973%26mode%3Ddesign%26t%3De4cDos07Se8nF8Er-1"
}