You are free to choose where you would like the Smart Checklist add-on to be rendered on the JIRA issue view.
The default position is Right Panel. To change it - navigate to Checklist menu and choose Show checklist in center panel:
Here's how it will look on a New Issue View.
- Navigate to an issue and open add-on section on a right sidebar
- Choose "Show checklist in center panel"
- Reload the page and see Smart Checklist in a new position
If you want to move it back to the Right, choose the corresponding Show checklist in right panel option in the add-on menu.