A point a connector's end may be glued to, in a content's own frame (its top-left is 0,0), before the frame is placed.
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The direction a connector leaves the site, in degrees clockwise from +x.
The site's number, as a connector's end names it.
A point a connector's end may be glued to, in a content's own frame (its top-left is 0,0), before the frame is placed.