what goes here
 

I cant seem to find were something plugs into this. See if you know what goes there. IT looks like a oil pipe but i cant seem to find what goes there. to the right of the yellow hose. Thanks marc

that looks like a hole for the cat air supply thingy..

Yep, split air line. Supplied air to the cat for cleaner exhaust.

so i am thinking that this dose not come off my engine but more off the car. I am trying to ask were is the other end located the block or the engine bay, because in the engine bay i cant seem to find it. Thanks Marc

Marc, it the line supplies air to the main cat. There is an aluminum hose that bolts to the spot in your pic and then travels under the car to the cat.

Marc, it's in your shop manual under Emissions Control. I think that line is not attached to your car, so look around for it.