[Changing regular lights to led (rear disco 1)]

Hi guys.

 I am new to owning a discovery 1 and would like to change my regular lights on the rear to led's

 I am changing all, brake lights, indicators etc etc

but i have never really done any wiring in cars and don't want to mess it up but I need to start somewhere. 

 I was wondering if someone could help me with the wiring of the disco, e.g what cables do what.

 The led's I have are just (live and neutral)

any help would be greatful. 

 I have a discovery 1 1994 es auto 7 seater.

 

 Cheers Matt