How to import images from Dropbox

I would like to use Lightroom CC on my mobile to import images from a specific folder in my Dropbox account.

The list under 'Camera Roll' includes Dropbox, however I would like to point to a specific folder in Dropbox. How do I do this?

To save space on my mobile, I export images to Dropbox. Lightroom CC defaults to the mobile Camera Roll. Since I no longer store images on my mobile's Camera Roll, and now store them in a Dropbox folder, I would like to figure out how to point to Dropbox folder instead. Any suggestions are greatly appreciated.

Adobe's FAQs do not go into much depth on this topic.

Thanks.