In order to connect to Ares follow these steps:
1) Install/download game client:
You need game client patched to a version 2.4.3. If you already have this client, delete “wtf” folder and go to step number 2.
2) Create game account:
Create your game account here: https://www.twinstar.cz/manager/Register.aspx
3) Set realmlist:
In the game folder find file named realmlist.wtf and replace content of this file with ONLY ONE of these realmlists:
set realmlist east.ares-wow.com
set realmlist west.ares-wow.com
set realmlist north.ares-wow.com
You can use any of these 4 and why we have more is explained here http://www.ares-wow.com/2017/10/08/at-the-end-of-the-road/
Each of them will connect you to the same realm, but via different route, which will reduce your latency if you use the ideal one of them for you.
After these steps you should be able to connect to Ares Test realm.