A second multi-coupling component for connecting to a first multi-coupling component in a multi-coupling system, the first multi-coupling component including a plurality of individual first fluid couplers, the second multi-coupling component comprising: a plurality of individual second fluid couplers; a handle assembly that is rotatable to configure the multi-coupling system between a disconnected state and a connected and locked state; a locking pin assembly that is attached to the handle assembly, the locking pin assembly including a locking pin that is moveable in an axial direction between an extended position and a retracted position; an operating lever configured to manipulate the locking pin assembly; and a housing that houses the plurality of individual second fluid couplers, the housing further including a locking pin hole; wherein: in the connected and locked state the locking pin is in the extended position in which a shaft end of the locking pin is located in the locking pin hole, thereby preventing rotation of the handle assembly; the locking pin assembly is manipulated by a user operation of the operating lever to move the locking pin from the extended position to the retracted position out from the locking pin hole to configure the multi-coupling system in a connected and unlocked state in which the handle assembly is rotatable to reconfigure the multi-coupling system to the disconnected state; and the locking pin assembly is configured to automatically retain the locking pin in the retracted position when the multi-coupling system is in the connected and unlocked state. a plurality of individual second fluid couplers; a handle assembly that is rotatable to configure the multi-coupling system between a disconnected state and a connected and locked state; a locking pin assembly that is attached to the handle assembly, the locking pin assembly including a locking pin that is moveable in an axial direction between an extended position and a retracted position; an operating lever configured to manipulate the locking pin assembly; and a housing that houses the plurality of individual second fluid couplers, the housing further including a locking pin hole; wherein: in the connected and locked state the locking pin is in the extended position in which a shaft end of the locking pin is located in the locking pin hole, thereby preventing rotation of the handle assembly; the locking pin assembly is manipulated by a user operation of the operating lever to move the locking pin from the extended position to the retracted position out from the locking pin hole to configure the multi-coupling system in a connected and unlocked state in which the handle assembly is rotatable to reconfigure the multi-coupling system to the disconnected state; and the locking pin assembly is configured to automatically retain the locking pin in the retracted position when the multi-coupling system is in the connected and unlocked state. in the connected and locked state the locking pin is in the extended position in which a shaft end of the locking pin is located in the locking pin hole, thereby preventing rotation of the handle assembly; the locking pin assembly is manipulated by a user operation of the operating lever to move the locking pin from the extended position to the retracted position out from the locking pin hole to configure the multi-coupling system in a connected and unlocked state in which the handle assembly is rotatable to reconfigure the multi-coupling system to the disconnected state; and the locking pin assembly is configured to automatically retain the locking pin in the retracted position when the multi-coupling system is in the connected and unlocked state.