A connector assembling machine a revolver mechanism coupled to a frame. The revolver mechanism includes a shaft coupled to the frame, an actuator operably coupled to the shaft to rotate the shaft, and a rotor rotated by the shaft. The rotor includes a hub coupled to the shaft and mounting brackets extending from the hub. The revolver mechanism includes cartridges coupled to the mounting brackets each having cartridge walls forming a connector cavity configured to receive an electrical connector. The cartridge has a window exposing receptacles of the electrical connector. The rotor is rotated to move the cartridges between a connector loading station, a connector processing station, and a connector unloading station. The cartridges are loaded with the electrical connectors in the connector loading station and unloaded in the connector unloading station. The cartridges position the electrical connectors for loading support plates into the receptacles in the connector processing station.