A connector assembly for electrically connecting a plurality of wires to a circuit board is described. The connector assembly includes a vertical connector that includes an insulative base having pluralities of substantially parallel first and second base channels formed on respective opposing first and second major surfaces of the base. The vertical connector further includes pluralities of first and second terminals in registration with the respective first and second base channels, each first and second terminal including a contact portion for making contact with a wire, and a press-fit portion for being inserted into a conductive via of a circuit board. At least a majority length of each first and second terminal is disposed outside the housing. Each first and second terminal is secured in the connector at least in part by virtue of making physical contact with a corresponding wire.