I bought a 10mm ratcheting wrench set that have flex heads from Harbor Freight it made it so much easier to turn the bolt. Do to the limited amount of space there is to turn it, I gave it about 8 turns to the right as your facing the car, which I think would be around 2 full turns and it brought it up even with the passenger side after I gave that side about 1 full turn as well. Now my lights are even and have decent range without blinding anyone since I don't get flashed and I have HIDS to.
https://www.harborfreight.com/5-pc-metric-flex-head-combination-ratcheting-wrench-set-60592.html
https://www.harborfreight.com/5-pc-metric-flex-head-combination-ratcheting-wrench-set-60592.html