Unfortunately, the Z Stuff motor internal wiring is such that they can only be wired color to same color wire "to play nicely in the sandbox". Depending on how the motors are oriented relative to the tracks, you can wire them color to same color and have both motors throw and stock rails move to the crossover or straight positions. If however the motors are posiitoned so you have to connect the opposite color wires, the motors will hum,buzz and not work or poorly.
To make my crossover work I had to use a set of 12VAC DPDT relays configured so one pair of opposite wired motors would throw, and other relay would set motors back again. Alot of wiring, clumsy but worked.
