Urgent help needed re ExBox installation

[RoverChris]

Today I finally got around to installing an Ex Box I have had sitting arround for ages in my 2015 D90 when it came to connecting it all up in the car there is a male plug coming through one of the grommets which I am unable to find the female end. I have looked at the fuse box, under the drivers seat, down below the ex box but can't find it anywhere.
I tried reconnecting the power and starting the car without it but all it does is set the alarm off.

Here are some pictures of the plug, if anyone can give me any info of what it is or where the female end should be/what it would be bundled with it would be greatly appreciated. It is my daily drive and if I can't get it back on the road by the end of the day I will be in a world of hurt.

[Tombie]

Have you separated the door loom out and put it back into the seat box?

[RoverChris]

No I haven't, I'll go back and have a look at that

[RoverChris]

So I went back and had another look at that bit of the instructions and the car and there are no other connectors in the drivers seat box. I assume this is because it is a 90 and there is no rear passenger door. I'm lost for ideas

[lump_a_charcoal]

I think it may be for the central locking for the door that you don't have.

[kogvos]

That plug isn't connected on my MY15 90 either, so I don't think that's your alarm problem.

[RoverChris]

I sorted it, turned out to be an easy fix. Thanks for the suggestions

[lump_a_charcoal]

What was it after all?