This pack contains parts 31 - 35.
PART 31.
The roll bar is included here.
The parts should be de-seamed and then repainted satin black.
Assembly is very straightforward.
PART 32.
The first of the electrical parts are here, including the speaker.
Installation is very easy but take care not to damage the speaker.
PART 33.
This set of parts contains the lateral supports for the right side of the car.
They are very simple to install and actually serve no real purpose as they will be completely hidden in the end and do not really support anything.
PART 34.
The circuit board and switch are included here.
Again, assembly is very straightforward but take care to make the connections correctly.
PART 35.
The wiring cables are in this set of parts.
Care should be taken to connect the wires correctly. They can be temporarily secured under the car with strips of masking tape so that they do not get pulled or damaged.
roymattblack attached the following image(s):