Looking at this photograph does not show what I have done very well, so a verbal explanation too. For identification purposes, bulb 1 - top left, bulb 2 = top right, bulb 3 = bottom left, bulb 4 = bottom centre, bulb 5 = bottom right.
Bulb 1 bottom pin connects to plug pin 2 (from the top)
Bulb 2 bottom pin connects to plug pin 1 (top)
Bulb 1 & 2 outer body connect to each other and to plug pin 3 (3rd from top) - car earth
Bulb 3 bottom pin, no change as it is correct, connected to plug pin 4 (4th from top)
Bulb 4 bottom pin connects to plug pin 5 (5th from top)
Bulb 5 bottom pin connects to plug pin 6 (bottom)
Bulb 3, 4, 5, outer body connect to each other and plug pin 3 - common to car earth
The earth connections bridge over the links between Bulb bottom pins and plug pins.