Connector assembly with cooperating terminals and method for connecting same

A connector having male and female terminals can be positively connected together without requiring alignment precision on the part of the housing for the terminals. A male terminal has a round stem with a large diameter proximal end portion and a small diameter distal end portion. A female terminal has a connection portion formed on a triangular horizontal cross-section and a pair of holding plate portions extending from a base plate portion. The connection portion can resiliently fit on an outer periphery of the large diameter portion. An insertion groove, which is slightly smaller than the diameter of the small diameter portion, is formed between front ends of the two holding plate portions. A pair of outwardly-opening guide plate portions are formed on opposite edges of the insertion groove so the female terminal can be fitted on the round stem and the small diameter portion is guided by the guide plate portions to fit in the insertion groove. The female and male terminals are thus positioned with respect to each other. When the female terminal is pushed further, the small diameter portion passes through the insertion groove. The female terminal is pushed downwardly so the connection portion fits on the outer periphery of the large diameter portion.