I don't have this particular unit, but do have a 60ct1/2 with a Mecamat, which is the precursor to TTL metering.
The Mecamat allows you to meter the flash output from the hot shoe location of the camera, and thus mount the head in another location, or in a soft box or other light modifier where it's own on board sensor is obscured. The Mecamat's switch settings for auto flash or manual flash over ride whatever the slider settings on the back of the flash head are set to.
I hope this helps you understand how your unit is likely going to work.
I am not a Nikon guy, however I am quite sure that M and A will work with all of your cameras, and try TTL to see which cameras it works with.