Connector apparatus

A connector apparatus comprising:

• a first housing having at least one cam follower;
• at least one first electrode provided in said first housing;
• a second housing including a fit-on portion that covers a portion of said first housing when the second housing is mated with said first housing;
• at least one second electrode provided in said second housing;
• a slide lever capable of moving linearly between an initial position and a fit-on position in a direction substantially orthogonal to a direction in which said second housing fits on said first housing, the slide lever including at least one cam groove, wherein said at least one first electrode and said at least one second electrode are connected to each other, with said fit-on portion being fitted on said first housing owing to a cam operation performed by cooperation of said at least one cam groove and said at least one cam follower, by moving said slide lever to the fit-on position;
• at least one first guide provided on an outer side surface of said first housing;
• and
• at least one second guide provide on an inner side surface of said fit-on portion,
• wherein the at least one first guide and the at least one second guide do not engage each other at an unmatching position of said second housing in which a front leading end portion of said second housing contacts a front base portion of said first housing and at a matching position in which an entrance of said at least one cam groove matches with said at least one cam follower, and the at least one first guide and the at least one second guide engage each other during movement of said second housing from said unmatching position to said matching position to thereby guide said second housing.