Let's get some facts straight first...I think you are lowered on Swifts, and have Kinetix rear camber and traction arms?
Anyway, for the 370z platform, I know that some advertisements state using the traction arms to adjust rear toe. While it does allow a little toe adjustment, it's not supposed to be done that way. It needs to be done via the stock toe bolt, aftermarket toe bolt, or the toe arms.
Also, notice that unlike some other manufacturers, SPL does not advertise their traction arms for the purpose of toe adjustment.
See what Synolimit and Norain said
Need Some Education: Toe Arms Vs Traction Arms