Connections 
You use the Connections screen to create connections and assign aliases to the connection properties. You can use the aliases in actions in the SAP Manufacturing Integration and Intelligence (SAP MII) Workbench instead of entering the connection details in the action configurations.
You define user name and password aliases on the Credential Storesscreen and assign users to connections. For more information, see Using Credential Stores.
You choose among the following connection types, which are used by related actions:
BC(SAP Business Connector)
WAS (SAP NetWeaver Application Server)
JCO (SAP Java Connector)
FTP (File Transfer Protocol)
MAIL (E-mail)
JMS (Java Message Service)
EJB (Enterprise JavaBeans)
CR (Crystal Reports)