Hello Art.
I've attached an updated PDF file that includes the image you mention in your last post. On page 2, you will see the original drawing of the spreader (top view). Just below that I've included a photo of the entire spreader from the same perspective.
I inserted "pins" (actually pens) in the two holes where the spreader is mounted to the mast to highlight their orientation. These holes are vertical, ie, parallel to the mast. I also inserted a pin in the slot at the tip of the spreader where the upper shroud rests.
Let me know if this doesn't give you and your rigger the information you need.
jack.
Spreader diagram.pdf