oh simple.
Jack up one side, pull the wheel, pull out the upper strut bolt, crack loose the lower one so the hub can move, stuff the SPC camber bolt in, put a large flat screwdriver in the vents in your brake rotor, push on it so the top moves inwards, and with the other hand turn the bolt head until the wheel will be tilted inwards at the top as much as you can. Hold the screwdriver in hard and tighten up the bolts.
Some tips, lube the bolt as it can rust and seize in there. Lube the strut/hub joint so it slides freely and will come apart easier later.
Also, once you have the adjustment bolt in place and mostly finger tight, so it moves but is not sloppy, take some time to understand how it works so you can actually get the most out of it. The first time I put a set in I thought I had it all the way negative but when I did the other side I realised I could get about another half a degree(fairly useful) out of it so I had to redo the other side.
MAKE SURE YOU GET YOUR TOE SET or you will wear your tires. Even if its been recently set, the camber change WILL change the toe settings.
I swear, this made a bigger handling differnce than my lowering springs and both strut braces.