it is basically a 12v solinoid that operates the lockout. it need 12v applied to it. I don't know how the D&D kit deals with this.
if factory equiped the computer alows you to go into reverse below a certain speed. like 5mph or something. I do not know if there is a way to deal with this on a nomal gt ecm.
you could do a push button knob, wire off the brake pedal these are things people do on the older hotrod side of things.