I had forgotten to install the brake light switch when I installed the pedal box, so that was removed again. Not an easy job on your own unless you have 'go go gadget arms'!
As I'm using the Lexus engine and intend to utilise the cruise control, I kept the swith from the donor. This switch has 4 wires, two for the brake lights and the other two for the cruise control.
I created a small bracket out of 25mm x 2mm flat aluminium bar with a slight bend in the middle to position the switch at the correct angle. I then drilled and tapped the pedal box and bolted it on with M5 button heads and spring washers.
I've also installed a second switch on the clutch pedal which will stop the starter operating unless the clutch is depressed, thus never accidentally starting it in gear.