If your 83 is like my 82, there are two breather hoses that attach to the air box. They are located in the lower back corners of the air box, one on the left side, the other on the right. (Duh).
I found that the one on the right is a little more difficult to hook up because the cables tend to be in the way. Put the air box part way in with the back side down at a 45° angle. Then get the two hoses on the air box oriented correctly, and then push the front end down. There may be cables and wires over the plenum that you have to move aside. And don't forget to install the rubber gasket on top of the plenum.
Then just hook up the hoses; left side hooks to a large nipple and the right side hooks to another hose.
Hope this helps.