That's a challenging one, Too many slots in the clip to make sense.
Mine looks like the first image. In that image the hook of the clip is to the right and the battery
side of the clip is below the clip.. This is based on a photo from somewhere that I thought indicated this was how it was done. The second image is from p116 of Bacon's Triumph Twin Restoration and that might be where it came from. I don't have the equivalent BSA book. I've been doing it like this since I setup my bike and its all lost to the sands of time.