It shows rotation is both directions. Front of hinge goes up, rear goes down to lower hood back of hood. The arrows both pointing down illustrate how to not lower a hood. Some elogate the rear slot to gain further adjustment, but the integal washer can hit the hinge's lip. If you change to a smaller diameter washer, you deviate from fastener correctness. Lube helps. Looks like you have more adjustment on the rear yet. Loosen the rear bolt, push up on the hood, which rotates the hinge to max out adjustment and tighten the bolt.