GNOME 3 "Connect to Server" and specify username
 

I've got a NAS box with some SMB shares on it which are browsable without authentication. If I use "Connect to Server" in GNOME 3 I can connect by entering the location as smb://ipaddress but that's read-only.

If I want to copy new files to a share I have to connect as a specified user. I find myself unable to figure out how to specify a username when connecting with GNOME 3's "Connect to Server" dialogue and Google searches have proved fruitless.

It seems ridiculous to have resort to asking on a forum for something so simple, but how does one do this?

The equivalent functionality in GNOME2 provided a field called username. :/

I have to specify the share name. Which makes some sort of sense I guess.. E.g. If I say I want to connect to

I get connected and can browse the shares that don't require authentication to read. If I say I want to connect to

I get the same as above. If I say I want to connect to
I get promoted for authentication.

GNOME 2 gives you a dialogue with fields for protocol, username, password, path etc. GNOME 3 gives you a single field and you guess what you need to type in it.