MSD 6A box into mazda

i'm trying to install a MSD 6A box into my 86 mazda b2000 it already has a blaster coil in it. i under stand the orange wire goes to coil + and the black goes to coil - and the red goes to the heavy gauge black with white stripe wire coming from the cab. but what about the white wire i have a heavy black with white stripe wire coming from the dist. and also a blue wire. please help.

Please, anyone have info on this question? thanks.

The white wire coming out of the box shouldn't go to anything. In most applications its un-used.