I'm not aware of a way to make them show in the list, but you could just type `smb://servername/sharename$` in that box, if you know the name of the share.

In that initial Connect to Server window, you can also click the `+` icon to bookmark it in the list below the text field. That way, you don't have to type it every time.

Alternately, if you have a bunch of them that you mount together, you can create an Automator script that will mount them for you, provided you know the share name for each. [I wrote about that option in an answer to another question back in October.][1]


  [1]: https://apple.stackexchange.com/questions/3307/automator-mount-a-network-volume/3308#3308