Robot Advance allows you to create or to modify your robot. ...
3-Wire "Y"-Cable 6" (2-pack)
Extension cables are used to extend the length of a 3-wire cable such that a motor or motor controller can be farther from a VEX Microcontroller.
3-Wire Extension Cables are available in lengths of 6, 12, 24 or 36 inches. 4-packs are available for each size.
There is also a 3-Wire "Y" Cable available in a length of 6". "Y"-cables allow 2 motors or servos to be driven by a single microcontroller output.