Its coming out of the fire wall drivers side from a bundle of wires, the inside of that plug or what ever it is green if that helps lolWhere does the other end of the one you're holding go to? The plugged hose on the vacuum tree might be part of the emissions and distributor advance. Download the vacuum diagrams for your year and see if you can find the correct one for your car, and that matches what items, like ported vacuum switches and distributor advance your engine has:
https://www.7173mustangs.com/thread-vacuum-hose-diagrams?pid=246021#pid246021
A lot my hoses and stuff are cut off ill double checkLooks like windshield washer hose. The piece broken is probably from a tee. If it is near the washer reservoir then it might be the nipple from the pump. The one on the engine that is plugged could be for the heat - a/c controls or it just might be a vacuum port not used. The one by the hinge is more than likely washer also, Do you have the spray nozzles on the bottom of the hood. Should be line going from washer to driver side to passenger side.
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