pictorial answer for you my friend.

yellow plug is for the map sensor as you now know, pic shows where the brown plug goes (like Parrot says)

picture is of my JDM loom so should be the same as what you have.

you can use an AE82 map sensor you will just have to change plugs, as only JDM MAP sensor use the circle plug. if need be i know someone who has a few JDM Map sensors if you want a JDM one drop me a pm and i'll suss it out for you.