For Mapping QMetry fields with JIRA fields after Integration click 'Save & Configure' window after Integration. Select Module and Default Tracker project and click 'Save and Map fields' button.
'Manage Field Mapping' window will appear. Select JIRA fields from External tracker fields and select QMetry fields from QMetry fields and click on 'Map' button to map the selected field.
Go to Admin Module > Manage Integration > click Configure from action tab > click Save and Map fields > select fields and click Map button.