Hi,
SAP_WAPI_WORKITEMS_TO_OBJECT will give you workitem details for particular SC.
pass below import paramters.
OBJTYPE BUS2121
OBJKEY " Pass 10 char shopping cart number
TOP_LEVEL_ITEMS
SELECTION_STATUS_VARIANT 0000
TIME 00.00.000000.00.0000
TEXT X
OUTPUT_ONLY_TOP_LEVEL
LANGUAGE EN
DETERMINE_TASK_FILTER
REMOVED_OBJECTS
Regards,
Ibrahim