Dexion I had exactly the same problem though mine is the 3.6. once it was put back on along with another pipe I found loose that someone on here told me where it went, the car ran so much better. The nipple on mine it should attach to is actually on the air filter cover you take off not the filter box itself.

Look here https://www.fullfatrr.com/forum/post598953.html#598953

Hope this helps.