No deck start/stop control cable in the CDJ-2000Nexus box?

That information is now transmitted over the LINK cable.  Look at the back of the CDJ2000nexus and you'll see there is nowhere to connect the old faderstart cables.

there actually is a place for the control cable

Yes, there is a jack input for "control" that is the same size as on the older 2000s.

Regardless, once you've connected up using the link cables it'll work that way as Pulse outlined above. One less cable to have to connect.

right, but not everyone own a mixer with ethernet ports so the cables are useful

Sure, I'm just making sure runningoutofspace is aware.

running out of space where? in the Nexus shipping box? lol    the decks have the control output already, but didnt include the cables, Pulse had mentioned there was no control in on the Nexus but there really is

If we were on reddit I would have said /u/runningoutofspace - thats the users name above ;)

LOL, fortunately I have a DJM900 :)