So I've looked at diagrams, pics etc and I can't find where the hose connects on the right side of the engine, it goes from left to right, from the air filter near the battery to the other side but i don't see where it reconnects

I have a video attached here Video of me describing it

It's a 2007 CHRYSLER ASPEN 4.7 FLEX FUEL

 

I have an 08 5.7L but I have upgraded to a CAI. By looking at it and my original air intake (still have it) that hose should connect at the oil fill tube. I know yours is a 4.7L, but I had the same tube running from the air box so I would guess the other end connects the same. It should have a little connection at the base of the fill tube.

 

As previously noted and seems to be confirmed by @calamity coyote the other end is on the right side back by the oil fill tube.

https://www.moparpartsgiant.com/part...agram=i2174513

 

So did this help at all? Did you find where the line went?