A harness connector comprising: a frame having a first end, a second end, and a pass-through opening extending between the first end and the second end along a longitudinal axis of the frame, a gate positioned within the pass-through opening between the first end and the second end (108, 110) of the frame and movable relative to the frame between a closed position to close the pass-through opening and an open position to open the pass-through opening; and a locking mechanism for selectively locking the gate in the closed position, the locking mechanism comprising: a rotatable knob connected to at least one of the first end and the second end (108, 110) of the frame and rotatable relative to the frame in a direction about the longitudinal axis; an outer sleeve surrounding at least a portion of the rotatable knob, the outer sleeve axially movable relative to the rotatable knob between a first position and a second position, wherein, in the first position of the outer sleeve, rotational movement of the rotatable knob is prevented, and wherein, in the second position of the outer sleeve, rotational movement of the rotatable knob is permitted; and a locking indent on the gate configured for receiving at least a portion of the rotatable knob when the gate is in the closed position, the locking indent comprising a curved sloped portion arranged at an angle relative to a longitudinal axis of the gate and a recess arranged substantially perpendicular to the longitudinal axis of the gate, wherein the rotatable knob is rotatable between a first position permitting longitudinal movement of the gate between the first end and the second end of the frame and a second position preventing longitudinal movement of the gate when the gate is in the closed position. a frame having a first end, a second end, and a pass-through opening extending between the first end and the second end along a longitudinal axis of the frame, a gate positioned within the pass-through opening between the first end and the second end (108, 110) of the frame and movable relative to the frame between a closed position to close the pass-through opening and an open position to open the pass-through opening; and a locking mechanism for selectively locking the gate in the closed position, the locking mechanism comprising: a rotatable knob connected to at least one of the first end and the second end (108, 110) of the frame and rotatable relative to the frame in a direction about the longitudinal axis; an outer sleeve surrounding at least a portion of the rotatable knob, the outer sleeve axially movable relative to the rotatable knob between a first position and a second position, wherein, in the first position of the outer sleeve, rotational movement of the rotatable knob is prevented, and wherein, in the second position of the outer sleeve, rotational movement of the rotatable knob is permitted; and a locking indent on the gate configured for receiving at least a portion of the rotatable knob when the gate is in the closed position, the locking indent comprising a curved sloped portion arranged at an angle relative to a longitudinal axis of the gate and a recess arranged substantially perpendicular to the longitudinal axis of the gate, wherein the rotatable knob is rotatable between a first position permitting longitudinal movement of the gate between the first end and the second end of the frame and a second position preventing longitudinal movement of the gate when the gate is in the closed position. a rotatable knob connected to at least one of the first end and the second end (108, 110) of the frame and rotatable relative to the frame in a direction about the longitudinal axis; an outer sleeve surrounding at least a portion of the rotatable knob, the outer sleeve axially movable relative to the rotatable knob between a first position and a second position, wherein, in the first position of the outer sleeve, rotational movement of the rotatable knob is prevented, and wherein, in the second position of the outer sleeve, rotational movement of the rotatable knob is permitted; and a locking indent on the gate configured for receiving at least a portion of the rotatable knob when the gate is in the closed position, the locking indent comprising a curved sloped portion arranged at an angle relative to a longitudinal axis of the gate and a recess arranged substantially perpendicular to the longitudinal axis of the gate, wherein the rotatable knob is rotatable between a first position permitting longitudinal movement of the gate between the first end and the second end of the frame and a second position preventing longitudinal movement of the gate when the gate is in the closed position.