It's anyone's guess,
Not a "guess" if there are in situ photographs attested to by Weitzman, Boone and Studebaker.
BALL made sure to confuse the record as to exactly which 'flat' Weitzman was looking under.
Not the first time BALL screwed up.
I think we know who's confused and who screwed up.
Weitzman's LOS had to be east-west or vise versa.
It's pretty hard to imagine Weitzman contorting himself to look through openings in the wooden pallets.
Weitzman later says "I was behind this section of books" which probably means he was merely squatting and looking as far as he comfortably could into the wooden pallets and the gaps between the cartons. Maybe he was to the south of the pallets and looked between the gap between Groups "B" and "C" and saw the rifle, where the Crime Lab photographs show it to be.
Regardless of where they put the arrow, If I'm correct, the rifle could not have been found in the position indicated.
"Crime Lab in situ photos" -- LOL
Sure.
Why would we disregard where they put the arrow? Because it confirms the rifle location was as it was in the Crime Lab photos?
BTW, what is "looking under the flat"? I can't find any definition of "flat" that says it's a wooden pallet.