Sorry, what I said before is not right. You can enter in IT 2002 an attendance type with starting date and end date so that it covers two days. If start/end times are entered, the start time will be the time the attendance started on the start date and the end time is the end of attendance on the end date.
However the attendance type config in T554S should allow 2 days if you want upto 48 hrs attendance.
In time sheet, you would enter the OT for both days, and it should create as per the entry an IT 2002 (or IT 2010) record as per your CATS config.