JDBC connection string

I have to connect SQL Server 2008 R2 database from PO 7.4 system. I know regarding updation of jdbc adapter by driver files of database.

I have already downloaded sqljdbc4.jar file.

I would like to know is there any format in which connection string needs to be formed? Also, in ID while configuring the jdbc receiver adapter to send data to SQL Server 2008 R2 database from PO, what should be specified in Database connection in JDBC Driver and Connection?

Pls tell. thx.