righto, well there should be a green with red stripe on the GTR loom interior side (loom with the black plug)
and you will need to splice that wire into black with pink strip on the BP loom (white plug) engine loom side
its the same as a BP n/a to GTX/GTR accept inverse
the required pictures showing hte wires are in the thread i said before. you have have to inverse it as your doing the process backwards so to speak...