the caliper probably should be at the front but they often get installed to the rear when theres a swaybar interfearance. There isn't any angle built into the spindle so it dont or wouldn't make a difference in alignment. Only the upper arms on wrong sides would make as much difference as the pictures suggest but notice the bump stops. The upper arms are on correct sides. The odd caster angle suggested by the pics must surely be lower ball joints worn completely out.