ServerQuery is a Telnet connection, so you'll need a telnet client such as putty and connect to your servers' IP address on the query port (defaults to 10011).
Next time please use Google... I merged your thread into this one, which just so happens to be the very first result you get on google for things like "connect to serverquery ts3". Wish people would at the very least show a tiny bit of effort and use google before posting threads...