A connector assembly for a noninvasive patient monitoring system, the connector assembly configured to communicate drive signals from a patient cable to a sensor circuit and to communicate detector signals indicative of attenuation of light by body tissue from the sensor circuit to the patient cable, the connector assembly comprising: a plurality of driver signal conduits (912, 2007, 1412) including a plurality of emitter signal conduits (913, 1412); two or more detector signal conduits (911, 2006, 1411); a first connector portion (110, 1700, 2300) comprising a housing (700, 1800, 2303, 2600); a second connector portion comprising a housing and configured to removably attach with the first connector portion, the housing of the second connector portion housing a segment of each of the plurality of emitter signal conduits (913, 1412) configured to couple with a corresponding segment of a corresponding emitter signal conduit housed by the housing (700, 1800, 2303, 2600) of the first connector portion (110, 1700, 2300), the housing of the second connector portion further housing a segment of each of the two or more detector signal conduits (911, 2006, 1411) configured to couple with a corresponding segment of a corresponding detector signal conduit housed by the housing (700, 1800, 2303, 2600) of the first connector portion (110, 1700, 2300); and a shielding mechanism configured to reduce unshielded areas surrounding the signal conduits, the shielding mechanism comprising two or more shielding sleeves, at least a portion of each of the two or more detector signal conduits disposed within a corresponding one of the two or more shielding sleeves, the emitter signal conduits disposed outside the two or more shielding sleeves, the shielding sleeves disposed proximate to one another. a plurality of driver signal conduits (912, 2007, 1412) including a plurality of emitter signal conduits (913, 1412); two or more detector signal conduits (911, 2006, 1411); a first connector portion (110, 1700, 2300) comprising a housing (700, 1800, 2303, 2600); a second connector portion comprising a housing and configured to removably attach with the first connector portion, the housing of the second connector portion housing a segment of each of the plurality of emitter signal conduits (913, 1412) configured to couple with a corresponding segment of a corresponding emitter signal conduit housed by the housing (700, 1800, 2303, 2600) of the first connector portion (110, 1700, 2300), the housing of the second connector portion further housing a segment of each of the two or more detector signal conduits (911, 2006, 1411) configured to couple with a corresponding segment of a corresponding detector signal conduit housed by the housing (700, 1800, 2303, 2600) of the first connector portion (110, 1700, 2300); and a shielding mechanism configured to reduce unshielded areas surrounding the signal conduits, the shielding mechanism comprising two or more shielding sleeves, at least a portion of each of the two or more detector signal conduits disposed within a corresponding one of the two or more shielding sleeves, the emitter signal conduits disposed outside the two or more shielding sleeves, the shielding sleeves disposed proximate to one another.