Hey guys I have a hose next to the 4wd actuator im not sure where its supposed to go looks like up in the engine bay? Its the thick black one adjacent to the black and red vac lines. I will try to upload a picture in a second.

 

That's the axle "breather" and yes it runs up into the engine bay. Somebody correct me but I think it ends somewhere near the upper shock mount ? There also should be a little breather cap at the end so air can go in/out but dirt stays out.

 

Yup, right here