xx343 is the white connector and goes to the heater core pipe that is nearest the driver's side. This one has more of a 90° tee than the black tee. The hose coming from the water pump is the one that has the "y" in it at the WP connection.
xx342 is the black connector and goes to the heater core pipe that is nearest the passenger fender. This one has less than a 90° tee that takes the down connection away from the firewall (angles toward the front of the engine compartment).
Note the different styles of hose connectors that come from the WP.
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