Hole location for vac windshield frame

I'm looking for the hole locations for mounting a vacuum wiper on a 30-31 windshield frame. Seems like there are a total of 4 holes, 2 for mounting, 1 for the vacuum hose, and 1 for the control rod. I've searched but maybe not in the correct places. Is there a place where those dimensions and sizes can be found?
 
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