The arrow is on the ridge overlooking the target, close to a bend on the cycle route. It points directly at the target and would have been illuminated for night bombing. There is a double row of concrete pads behind it which I suspect supported a building containing the generator.
View over the target from the arrow. The light-coloured vegetation is the swamp. The target is near the two people, about 30 metres closer to us.
View towards the arrow. There is a light green patch near the skyline. The arrow is in the gorse bushes just to the right of this.