Yes, it goes to MAP sensor. There are two fittings on the intake manifold right next to each other, one for the MAP sensor and one for the CCV. I received hoses for both as well when I ordered from CARiD.The rear hose on carID came with 2 hoses. One for the CCV elbow to manifold and another for manifold from somewheres else. I think it may be for the MAP sensor?
I believe It plugs into top of the firewall above the valve cover. I saw somewhere in the FSM that this is the MAP sensor location.