Distribution Centers is not available in this version of OCTO Ops. The Coming soon badge on this page refers to the Distribution Centers feature itself, not just to this guide — there is no Distribution Centers, Customer Orders, Purchase Orders, Invoices, or Pricing Groups screen you can open in the application yet.
Stock held in your own warehouses is tracked in Warehouse instead. Distribution Centers still appears in the left navigation with its five sub-areas, but selecting any of them opens a page-not-found error.