The connection string is;
Data Source=190.190.200.100,1433;Network Library=DBMSSOCN;Initial Catalog=myDataBase;User ID=myUsername;Password=myPassword;
If you are trying to connect from outside of the local network i.e. via the internet, the IP address will have to be the public IP of the network with forwarding setup for port 1433 so that any requests that come in on that port are forwarded to the database server.
Here[
^] is a list of connection strings (bookmark it).