Having just done this for my new ecu(emerald), I found they are not as ford state, and some are very different, there are at least three variations.
Here goes, but check yourself with metre/wire etc
I assume although you say behind the battery it is in a different place to 2wd where it is under the dash but right at top behind ecu, same/ish colours.
RED/BLUE = PERMANENT LIVE
BLACK = SWITCHED LIVE(ignition switch)
BLACK/RED = FUEL PUMP(live)
BROWN/WHITE TEMP GAUGE
2wd have thin green which is tacho and a brown/red which is air con leading to a purple relay taped to loom.
BROWN/GREEN should be oil pressure on yours(warning light).
Hope this helps, some cars the oil pressure light sis through ecu loom others through car loom(as mine).
tabetha