Stratum is dependent on the pool you are operating with. First you need to find a pool that supports terracoin, a short list can be found at terracon.org.

Once you decide on a pool, read their "Help" section to find the server settings required. I works exactly the same as bitcoin, you will enter a server address, a connection port, a username and a password.

Assuming you are using cgminer the parameters will look something like this:

cgminer -o http://pool:port -u username -p password

But plug in the values given from the pool. Welcome to Stack Exchange and good luck!