Ever since the original cheat engine files to 2K15 (which were mediafire) were deleted a long time back, there's been some sliders that are still standing from the time it was released (2014-2015), or some of the files have been reuploaded on sites like Fearless Cheat Engine
All of them are found on GitHub and all credit goes to the original poster [Hexorg]
*DISCLAIMER: THE CHEAT ENGINE WILL WORK DEPENDING ON WHATEVER VERSION OF 2K15 YOU HAVE*
**THOSE INCLUDE LEGAL COPY, PIRATED, OG COPY, STEAM, PRE-PATCH 1-2-3-4, ETC. IT VARIES**
.CT such as the sliders, reloaded will work, and some after patch 1 and on won't work
ALSO MENTION THAT HEXORG HAS OTHER TABLES FOR DIFFERENT GAMES, NOT JUST NBA 2K, ALSO THE FILE HAS TABLES FOR 2K13 -2K17
https://github.com/Hexorg/CheatEngineTables
ALL CREDITS GO TO THE RESPECTIVE CREATORS
ENJOY!