...
Write mapping: Copy the value of a specific cell into the Jira field. Set the calculated results on the table to the Jira field, for example.
Map by the ribbon menu on Full-featured editor (recommended)
Select a specific cell and select a mapping direction on the ribbon menu.
...
In the shown dialog, select a target Jira field.
...
Map from the context menu on Jira issue (recommended)
Click the right button on a specific cell and select "Jira field" in the context menu. In the shown dialog, select a mapping direction and a target Jira field.
...