If it's the nacelle, it has to from the back looking to the front. In the head on shots of the Enterprise, you see the intercoolers at the very back. In this shot, there is waaaaay too much space beyond those intercoolers to be from the front - back. These are from the back looking front.
Also to note the intercoolers have a slight decline in curvature starting from the further top point from the camera and coming to the camera.
In the head on shot, from what we can see, this is happening from front to back.