Power supply circuit connector and method of connecting power supply circuit

A power supply circuit connector of a power supply circuit, the power supply circuit connector comprising:

• a housing including:
• a first switch terminal configured to connect a pair of main circuit terminals of another housing by means of a lever rotated to a first certain position;
• the lever rotatably supported to the housing, the lever including:
• a second switch terminal having a first part and a second part defining therebetween an inner width which is narrower downward in a right-and-left direction, a lower end part of the second switch terminal being elastically deformable around an upper end part of the second switch terminal on right and left sides;
• and
• a guide groove defined in the lever and to which a guide pin is inserted.

A method of connecting a power supply circuit, the method comprising:

• a first operation for engaging a first housing with a lever, the first housing including a pair of main circuit terminals and a pair of mated state sensor terminals while the lever being rotatably supported to a second housing;
• a second operation including the following sub-operations:
• rotating the lever to a first certain position to thereby mate the second housing with the first housing, and
• connecting the pair of the main circuit terminals with each other via a first switch terminal provided in the second housing;
• and
• a third operation including the following sub-operations:
• rotating the lever to a second certain position after the first certain position,
• connecting the pair of the mated state sensor terminals with each other via a second switch terminal provided in the lever, and
• bringing the power supply circuit into a conduction state.