You don't say (or can't see?) what the one end is attached to.
When recently changing battery on my '98 there was a hose coming from atx to the top of the rear bolt for the battery hold down clamp. It ended and pointed down just past the plastic clamp holding it the bolt, so I presumed an air release or overflow from atx.


98 Mystique LS v6 atx 163,000km 97 Contour LX v6 atx 163,000km