Head to https://dash.streamcord.io.
Click on your server's name. If you don't see your server, check that you have the Manage Server permission and are logged in with the correct Discord account.
Go to the "Live role" tab.
Under the "Live role" dropdown box, choose the role that you want members to be given when they go live.
Click "Update settings".
Optional: Select a filter role by choosing a role from the "Filter role" dropdown box. The filter role acts as a whitelist. If enabled, only people who have the filter role will be able to receive the live role.