no rear fogs

hi cant get rear fogs working ive got to grey and white wires with spades on them but can't seem to find were they go any ideas.
mk1 white campaign going for mot on monday cheers gaz :dontknow:

Fog wiring plugs in to rear light cluster on pass side and is then patched to drivers only using a strap across the rear panel [you should only have a bulb fitted in drivers side]. Fuze , on top of fuze board above relay 5 see sticky above here . Check with a basic meter for power , they only work with dipped beam on and for MOT must have the warning light on the switch on .