A method for producing modular electrical connectors having varying contact element configurations includes providing a common header component having a plurality of receptacle spaces defined therein. A plurality of different contact sub-assemblies are provided having varying contact element configurations, with each of sub-assembly having a common size configured for receipt in the receptacle spaces. A pattern of the contact sub-assemblies is defined for a particular desired connector configuration from any combination of the contact sub-assemblies, and the contact sub-assemblies are fitted and adhered into the receptacle spaces in the header component according to the pattern. A kit may be provided with the modular components for making the connectors.