Custom chart in dashboard in exisitng module

Hello.

I create a custom report based on employee doctype. Now I want to add my report’s pie chart in Human Resource dashboard.

When I create a Dashboard Chart and map it with Human Resource dashboard, it will two json file in the HR module.

How can I add custom chart in my custom app? Which will add these json files in my custom app.

Thank you

is override_doctype_dashboards this in hooks.py is related with this issue to resolve?