I was doing a google search earlier and came across something I hadn't seen before, the opwiki.readthedocs.org in pdf format. It's 89 pages have a wealth of information on pin outs, cable connections, configuration, etc... all in a convenient single file. It seems to be new, dated December 12.
Maybe I'm the only one who didn't know about it but I thought I'd post the link to it anyway:
https://media.readthedocs.org/pdf/opwiki/latest/opwiki.pdfNow if I could just remember what I was googling for when I got distracted by this...
I just found a link to get it in epub format:
https://readthedocs.org/projects/opwiki/downloads/epub/latest/