wiring of a self dimming mirror

[macafee2]

A few years ago I needed help with wiring a self dimming mirror and got all the help I needed.
I have a similar problem but that thread did not real with as it was not required.

The self dimming mirror has 7 wires. I thought only 3 were used.
what do the 7 wires do?
Which 3 do I need to use?
Which wire is ignition live, reverse and neutral?


I have found a plug that fits but the colour code is very different and only has 5 wires

thank you

macafee2