Stick the 6 Port Expansion Board on to the side of the 1 x 3 black
technic liftarm, which is inside the rectangle technic piece that is roughly in
the centre of the car.
Grab the 30cm Extension Cable and plug it into the best port on the 6
Port Expansion Board that leaves the least amount of slack in the cable.
Sit the car upright again and move it around so you can access the boot.