i have seen a picture from a wm20 that was attached with a clip on the girder to fit the speedo cable,on this picture i can,t see good how it looks like.
if somebody have a picture from the clip only it would be great.
i have already made the clips for the rearlight cable that sitting on the horizontal tube that goes to the rear mudguard.
I did notice that there wasn't a photo of that clip Looking at the photo I guess that it must spring open to fit around the fork leg, it also looks like you could have a cable each side. Henk posted the thread, he may be able to shed more light on the subject, wouldn't mind some clips myself.
Dave