An exemplary header insert assembly, and methods of manufacture and use thereof. In one embodiment, the header insert assembly comprises a connector insert assembly having an insert body assembly consisting of an insert body element. The insert body element includes an electronic component receiving cavity that is configured to receive any number of electronic components. The insert body assembly also includes a wire termination feature that includes termination slots that position the wire ends of the wire wound electronic components adjacent to a substrate to which the wire ends are ultimately to be secured. The wire ends are then secured to the substrate using, for example, a mass termination technique. The aforementioned header insert assembly can then be optionally inserted into a single or multi-port connector assembly. Methods of manufacturing the aforementioned single or multi-port connector assemblies are also disclosed.