John, just checked my old S1 wiring diagram and as suspected there are no fuses or cables marked up as Aux lights
I used the 30amp Aircon feed to the 8 way bulkhead fusebox (as I had no aircon) mounted a relay below & took the 'trigger' wire off high beam, worked well
Andy MOT, may be able to confirm but my MOT chap said if linked to hi-beam, the spot lamps did not need testing for aim, if on a separate switch they did (as the driver could leave them on)