In Slack, head to the private channel where you woud like to create the new list in.
Type /todo and press enter
This will create the new list in the To-do Dashboard
The private channel will come up as private-conversation*. Therefore, it is recommended to change the name of the to-do list by clicking on the name and changing it to something that is recognizable.
*Slack does not provide us information of the name of private channels
NOTE: If other team members who are participants of the private channel list cannot see the list in their Dashboard, advise them to type /todo in the private channel.