You plumb it in on the rear brake side of the bias valve, into either pipe at the subframe. If you put it on the master side of the bias valve it wont be strong, the bias valve will kill it.
I have often thought this would be good, remove both lines from the bias valve that go to the wheels and join them with a T piece, plug 1 hole in the bias valve, fit a line from the other hole on the bias to the inlet of the handbrake, fit a line from handbrake output to T piece.

RACE

_________________
Dean Hutton's first car was a Mini.
kimini wrote:

It's the boobs and testosterone that make this place fun-ner

!!
Jimmyinamini wrote:
It's not nice to throw spank on the floor.