Jarek,
Are you trying to connect directly to kvm (libvirt) using noVNC without using websockify? kvm/qemu do not yet support WebSockets for VNC connections (so websockify is required to bridge), however, Tim Hardek is working on adding this support but it is not yet integrated so you will need to use websockify until that point.
Websockify has a --target-config option that allows you to define a list of target vnc host:port combinations in a file (or directory of files):
--target-config=FILE Configuration file containing valid targets in the
form 'token: host:port' or, alternatively, a directory
containing configuration files of this form
Then you pass "?token=TOKEN" as the websocket path (this is the path passed to websockify, not the URL of noVNC) and the matching option from the config will be used as the target.
Does that answer your question or did I misunderstand the issue you are having?
Joel Martin (kanaka)