Distributor, Crank Position Sensor and Idle Control Valve are connected to this part of the loom, this remaining plug is spare. I've borrowed a picture to show all the plugs.

http://i182.photobucket.com/albums/x...=1508180219133

It appears to be a cable much larger than standard 1.5mm coloured wires with a copper outer.

Can you help identify the plug please?