Cut list item are not files, so they don't have a data card of their own... unless I'm missing something...
Anyway there is a solution in the KB for displaying these properties in the BOM tab - S-054029:
"In order for Enterprise PDM to display the cut list item properties in the weldment cut list BOM tab, the SolidWorks part file data card must have text controls mapped to card variables with a CustomProperty block attribute whose name is the cut list item property.
Without the card variable, Enterprise PDM cannot push to the weldment cut list BOM the cut list item properties' values."
Did you try it?
Yes I tryed this, still no luck. I created a variable just like I would do for the normal .sldasm and added all of the same attributes, nothing has worked yet.