your nissan central locking box which is a box under the steering wheel, will have two yellow wires coming out of it, one to each door. if these are cut the doors open and if you connect them to ground the doors will close. or the other way around its a long time since i did this.
i think it was:
but this was when i first got the car maybe 5 years ago, so i really don't remember. I think there was a guy advertising on ebay too, he said he had the Viewt roof patterns, which is the same as the march.