Do you have the relay pack which allows you to use both transbrake and O/D on the same button or is it only the transbrake alone you want to wire?
I remember it was pretty simple, but I can't remember exactly how I did it.
I think I took 12V from a keyed source (only 12v when key On) to the transbrake button, and from the button down to the transmission.
But I also wired an extra flip switch between the keyed 12v source and the button, as safety so that I can't press the transbrake button on accident while the car is moving.
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