Hi @dariorn8 and welcome to KNIME forum,
You have to pass the flow variable to the “Values” option in the Flow Variables tab:
You can create an array flow variable and assign it to this option (string would fill a single cell).
IMPORTANT:
You have to assign some fake values to the table cell in order to have the values in the list be appeared in the output:
The values in the list will appear row wise. A row is filled and then the second row and so on.