Asked — Edited
Resolved by CardboardHacker!
It has been said that the EZB4's middle bus will have whatever VCC that you supply it. But, will the little 5v two pin connector still be there?
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MOVIE MAKER! Don't wire the 5 volts from the sabertooth to your ez-b port!
Like Richard said, all you need the the signal cable to s1 on the saber and the ground.
Nice catch Richard.