The fields AccuWorkIssueLink, AccuWorkKey, AccuWorkChangePackage and AccuWorkChangePackageHistory are not visible after a fresh installation of JIRA.
To retrieve the fields you must perform the following steps:
Launch AccuSync Management Console and navigate to Connections tab, select JIRA.
Add JIRA details and validate the test connection.
Once test connection is successful, refresh the AccuSync page a couple of times.
The fields will be visible in the JIRA View Custom Fields page.