I went thru all the broadcast sheets that I have and all the Z's (20-30 of them) have a MF cable except one that has a BR cable on it. No other docs on that car, but I'd guess that car probably had T60.
Hey, if it fits, that's what matters...
BTW, the Z cables on the T60 page are only if the car has T60. 6290592 would have been the cable for the L6 and the base LF7/L14 motors with T60, per that page. Not to say it couldn't have other usages....