This diagram is from Molecular Cell Biology by Lodish, 2000 which states:
The other core-polymerase molecule, which elongates the lagging strand, moves with its β-subunit clamp in the direction opposite to that of the fork movement.
Again the images provided in Principle of genetics by Simmons, 2015 and Cell Biology by Karp, indicate that the catalytic cores are directed in the same direction. The following diagram is from former book.
Which one is correct and why(please provide citations)?