Yes, you can add the server manual.
Connection -> Connect -> Add Server (right click)
Label Weissbierbude (or what you want...)
Server Adress: 87.106.210.146:8770
Nickname: Your Nick
Uncheck "Allow server to assign a nickname"
Check Registered
loginname -> you've recieved an email with your login-name and password. Usually it's your nickname on the homepage just in lower case. ie for me it's "hubschrauber"
password -> It's also in the email you recieved on creating your ts-account
It's not the password you use to login on the homepage.
Check Auto-Reconnect (it's just for reconnects after you have had a 24h disconnect or something like that)
Connect
The next time you start Teamspeak you just need doubleclick that server (Connection -> Connect)