Central locking system

[Ivan141]

The brakelight wire is used as a sort of switch I guess.. when you press the pedal, the wire gets 12 volts, which switches the starting system open or something like that. (so you'd need to press the brake pedal before turning the key).
The direction lights are probably hooked up parallel to the existing wires, so you'd need to splice into those wires or hook up the extra wires at the connectors.

If you leave your starting system as is and forget the start-interrupting device and remote starting then you wont need thoseconnections either I think.. the additional anti-theft measure couldnt hurt though.