dispatch.sr.ht is a sr.ht service which is used to connect resources on sourcehut with resources hosted on third-party services.
On the dashboard we see a searchable list of your configured tasks. Clicking each task will take you to a settings page. On the left is the "Configure new task" button, used for that purpose.
The list of available tasks is shown on the task configuration page. Select a task to configure it, and you will be taken to a task-specific configuration page. Documentation for each task is available on these pages.