It's the link you gave me. On the side menu one of the options leads to RC(?) updates - not the nightlies or the Experimental ones. However, they are showing in the settings CyanogenMod has installed on the phone so I don't think I have to go to the link.
Sent from the Superuser account on my newly rooted Sprint Galaxy Nexus on CM 10.1
When it comes to updates you don't have to apply them all the time. If I remember correctly (someone correct me if I'm wrong), the RC builds are the "final" builds for that version. They may include tweaks, fixes, etc. I don't always update right away if everything is working fine for me