Here's a little tip for you perpetually-idle queue-avoiders: If for some reason there is no AddOns folder (there should be), just create an AddOns folder within Interface and keep going. Just like retail WoW (Isn't WoWC also retail? Whatever.), you should have an Interface folder within the game directory, and an AddOns folder inside it. Those using 32-bit Windows may find the game simply in C:\Program Files\World of Warcraft\_classic_, but I'm not 100 sure on that.
You can copy the above and paste it into your file browser if you like, or manually seek it out. Locate Your World of Warcraft Classic FolderĬhances are your World of Warcraft folder is in the default directory. So you've got some addons you want to slap onto your client, you've got the download pages up or have outright downloaded their. I'm not going to do that since the process is incredibly simple in any case. Looking around, a lot of the tutorials I've found seem to assume people don't know how to unzip things to folders or use a computer much past clicking on shiny icons.
If you've installed addons in modern WoW, this whole process really isn't all that much different.