Sort of like that Georg. That looks like the old Fender way of jamming the 'pushback' wiring through two holes. I was thinking more of this style:
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Yeah, well, it's much the same I think. Between your pics and the sketch I guess it's pretty clear.
Regards, Allan.....
Only nuts eat squirrels. Keep yer tools sharp! That way you can use more of your strength guiding them AWAY from your body rather than forcing the cut!!!