rear, i havent figured out yet.
front camber is slide-plates locked with a nut, longer truck-screws with clipped threads to screw into the knuckles.
you could try the exact same thing on the rear, but i suspect that a rear mounted camber adjustment is more viable, i.e. the rear clip "protector" retrofitted with sliders and slide arms to adjust the camber. i need more styrene to test this out. back to my trusty exacto knife