You can place electrical connectors in either the top-level assembly or the route subassembly. Where you decide to place them depends on how you intend to assemble the actual hardware.
Top-level Assembly
To place connectors in the top-level assembly, make sure Automatically route on drop of flanges/connectors is not selected in Routing Options.
If open-ended wires are attached to the connector as the harness is installed, you should place the connector in the top-level assembly rather than the route subsassembly.
The connector appears on the harness drawing or bill of materials as 'External
connector'.
If you import a from-to list, the software detects connectors that already exist in the top-level assembly and does not insert duplicate connectors into the route subassembly.
Route Subassembly
To manually place connectors in the route subassembly, make sure Automatically route on drop of flanges/connectors is selected in Routing Options.
If a connector is crimped or sealed to the harness during the manufacture of the harness, you should place the connector in the route subassembly rather than the top-level assembly.
The connector appears on the harness drawing and bill of materials.
If you import a from-to list and the connectors are not in the top-level assembly, the software automatically places the connectors in the route subassembly.