There are 2 thin hard Plastic tubing lines that come out of my firewall near the Heater core. They both have a rubber end on them and they are just sitting there not connected. One is like light pink color and the other is a light gray color. Do any of you guys know what these are for and where they connect? I also have one of those black round plastic vacuum chambers in the engine compartment that isn't connected. It has 2 ports on it. One is bigger than the other. Where does this tie into the vacuum routing?