This looks to be key section:
In the Applied column, select the checkbox next to the following values:
• SVB | Bill Distribtn Sched Line: Applying the segment to this custom record enables the SVB solution to use the custom segment when distributing expenses. It also makes the custom segment list appear in the SVB | Bill Distribtn Sched Line record in the Destination area.
• SVB | Bill Distribution Details: Applying the segment to this custom record enables the SVB solution to use the custom segment when distributing expenses. It also enables you to customize the SVB | Bill Distribtn Sched Line Schedule Lines view to display the new segment in the SVB | Bill Distribution Details table.