That was indeed the screw to remove and why I didn't see that on page 11 is beyond me at this point. Anyway if you look at the drawing on page 11 the, (what I believe are resistors, I do not understand electronics thus my question) round things hanging down are too low to allow the battery to slip in under them without pushing them up so I'll leave it out. I did insert the battery part way and ran it without the shell and it work properly after shutting down.
Thanks again, my question is answered.
Nick