Working on wiring turn signals, tail light, horn and headlight (everything in other words) on my son's 1971 T120 Triumph Bonneville frame with 1973 T140 motor... she suffered some hacking before we got to do our own.
There was no main fuse at all- Oh boy!
Ahh the Brits, they had to hook up their batteries backwards to compensate for driving on the wrong side of the road.