I drive a 1998 1.8LX and the wiring appears to be there...
However, the plugs I found taped to both chassis legs are quite different to the fitment apparently needed for the H1 bulbs & lamps I have.
The lamps are indeed specifically mk1 Focus front fogs, but the H1 live & earth sit at: (/|); whereas the plug sockets on my loom sit parallel: (||)

I can't seem to find one but, am I missing a connector between the two?!