**tl;dr**: How to access folder shared in host system from within Yosemite run in VirtualBox (guest)?

I have added a shared folder in my VirtualBox (went to virtual machine's settings, then to `Shared Folder` and added a new shared folder path there). But since I'm a complete newbiew to MacOS (this is actually one of the first times, I see this system) I'm completely lost, where I can access this shared folder or how can I mount it in Finder.

I have tried everything, I could come with. Tried to browse all the folders (including `Shared`) in Finder or is some other open dialog, tried to browse my home (root) folder etc. No effect so far.