I have done that before.
My circuit board isn't labelled like that but I have a pic of which post the red was on. Apparently it doesn't matter anyway.
I’ll probably clamp between 2 nuts. It would be nice to know how the factory attached the wire to the board (board/wire/nut or board/nut/wire/nut).
Of course the other option it to install it stock and put in the MAD upgrade.