At this point, 2 days is unlikely you'd improve your fundamentals.
Check your Q results. its strange that Kaplan
and Manhattan are so close despite the huge differential in test difficulty. Are you making a lot of careless mistakes? If so, find out how you usually make careless mistakes and try to minimize them. A quant at 44-45 will mean you have to absolutely ace the verbal at 42 (95th percentile) in order to breach 700. If you can assure yourself 47++ for quant, you'll have a much bigger leeway in verbal.
Its unfortunate that you used up the GMATprep material, but at this point, just go in with a confident mind, don't panic on the actual day and hope for the best. With your prep scores, its definitely possible to hit 700. Take the Kaplan
score with a pinch of salt as their algo appears to have been developed while the programmer was drunk.