fog light wiring

[bex1151]

BEX1002 is moving toward resurrection. Car came with fog lights, but they weren't connected when I purchased the car.  There is no evidence of a separate switch to turn them on.  Are they usually connected to the headlight switch?  Early Jaguar XK120 had a 4 position switch (off, side, headlight, fog) with a separate keyed switch.  I haven't been able to find any information on how thew fog lights were wired on the Ace.  Can anyone help me?  Aloha   Terry