A process and system for mounting terminals with electric wires in cavities of connector housings. Press-connecting terminals are initially loaded in cavities arranged in an upper surface of a connector jig and electric wires are press-connected on the terminals in the jigs. Then, the terminals with electric wires are transferred from the connector jig to cavities arranged in a lower surface of a inserting jig by pins arranged to contact and push the terminals from below in the transfer direction. Then, the terminals are loaded from the inserting jig to cavities of connector housings from the back by blades arranged to contact and push the terminals from one end in the inserting directing.