Fluid line autoconnect apparatus and methods for medical treatment system

A fluid line connection system for a peritoneal dialysis system, the fluid line connection system comprising:

• a fluid handling cassette comprising:
• a generally planar body with at least one pump chamber formed as a depression in a first side of the body and a plurality of flowpaths for a fluid, and
• a plurality of dialysate solution line spikes located at a first end of the body, the solution line spikes being in fluid communication with the at least one pump chamber via at least one flowpath of the plurality of flowpaths and arranged so that a longitudinal axis of each of the spikes is parallel with a plane of the body of the fluid handing cassette;
• a housing that encloses a control system to control movement of the fluid in the fluid handling cassette and includes a door that is movably mounted to the housing;
• and
• a carriage mounted to move along guides extending along a length of the door, the carriage being arranged to receive a plurality of solution lines, each solution line of the plurality of solution lines having a connector end, wherein the carriage is arranged to automatically fluidly connect the connector end of each solution line of the plurality of solution lines with a corresponding spike of the plurality of dialysate solution line spikes.