Manual design starts by dragging and dropping an electrical connector. When you drop the connector, the Routing application automatically creates a route subassembly and starts creating an electrical route model. Continue to drag and drop additional connectors as required.
You can also add wires manually by selecting the Edit Wires command. In the Edit Wires PropertyManager, you can select the wire for routing from the Cable/Wire library and then select the route path between connectors for each wire.
For electrical designs, all connectors must have a unique reference name. You should not have two connectors with the same name.