If you remove the front marker light from the fender (push it forward and pop the back out) you can see what you're doing through that hole while you work your wrench through the access panel in the fender liner. I left the wheel on but turned the steering wheel to move the front tire out of my way. I positioned a small flashlight inside the bumper cavity to light up the required area. You don't need to remove the lower threaded collars as they will come off with the headlight assembly unless you need the clearance to wiggle the assembly out - it's a PITA but it will come out if you're patient and get it at just the right angle. The first one will take you a while accompanied by copious cursing and maybe a band-aid or two, but then you'll be able to see how it all goes together and the second one will be a breeze.