B1Y004 is a "container" hot fix that contains "member" hot fixes which will update your SAS software components.
See "What is a container hot fix?" in the SAS Hot Fix FAQ for more information on container and member hot fixes.
A manifest listing the contents of each of the following "member" hot fixes is available:
Y97006 manifest for SAS Enterprise Case Management Mid-Tier 6.3_M1
B1X003 manifest for SAS Enterprise Case Management Server 6.3_M1