Dana 60 vent tube location?

[4rcFed]

Ok, where does the vent tube, on a Dana 60 go?

I have my axle ready to swap into my truck, but the vent tube is cut off. I see there is a fitting that goes into the diff, that is crimped.

But approx how long is the vent tube?
Where does it go from the axle (up in to the engine compartment)?
And what is on the other end?

I appreciate the help! Looking to complete the swap next weekend. Just finishing up a few items, preparing for the real work.