HELP!!! Coach batteries not recognized by inverter

For all you kind enough to reply, you were all correct!!!! My expert did not wire any of the cable in the wrong place, but there was one cable that had fallen down behind the large battery bank and he missed it.
Hence the obvious problem.
However, we did find a number of other problems so all was not a waste.

Thank you all again for your input.

MtLaw a/k/a Lee Henning