1 - Launch Arma
2 - Click on Multiplayer and select Server Browser
3 - Click on Direct Connect found towards the top of the screen.
4 - Enter the follow IP and Port Number
IP = 188.8.131.52
Port = 2702
5 - Click Join and "King of the Hill - Restore Server" will be available to join.
6 - Join the server!
Password = 4567
7 - Join OPFOR and patiently wait for the admin to restore you.