Yes you do need these but idher desi log hain they only do the bare minimum and risk every thing else.
For complete setup.
You need the wiring to be done from the ECU to the stick
A relay in beneath the glove box
A fuse in fuse box in engine bay
Brake sensor (which is not a sensor its a whole brake stop pedal behind the brake pedal which has a sensor in if for cruise control cars)
I think the meter has light but no bulb and no wiring. So wiring from the switch to the meter and a bulb for the light.