This JST XH two wire inline connector set ships with both the male and female side of the connector pre assembled with ~80mm leads. The wires are rated to 300V 24AWG and will handle approximately one amp. The connector is keyed to prevent it from being reverse inserted. There is also a locking tab to prevent the connection from being pulled apart accidentally.

The connector body (when both halves are connected) measures 17 x 7.5x 6.5mm with the wires extending ~8cm on each side.