If these are tied high to a positive voltage, you could place a single pole double throw toggle switch in the lines to the enable ports. Connect the outputs going to the enable ports on the switches common terminals and the high on one set terminals and ground on the other set. Just verify the switch orientation to the terminals so you don't create a direct short.Originally Posted by rebrumm
Another way is to use a single non-maintained push button that could trigger a flip-flop circuit to control the on/off. Somewhat more complex, but not impossible.
Do you know what the voltage sources are that tie these inputs high? This could involve associated circuits if the inputs require 24v.