The best place to post Business Suite-related questions is at the SAP-on-ASE community at http://scn.sap.com/community/sybase-ase. This community is primarily focused on custom (i.e. non-SAP) applications.
That said, SCC is accessed with a browser. Assuming SCC is already started, go to https://hostname:8283/scc (hostname is the host where ASE is installed on and where SCC runs). The default login for non-SAP installations=sccadmin (I'm assuming this is the same in a SAP environment). Until recently, the default SCC password was blank, but in recent ASE versions you may be required to specify a password when installing.