Changing voltage on ESC


I’m looking into upgrading the battery pack on my electric skateboard from 29v to 42v. After a quick google search I might be able to reuse my current ESC for this just by unsoldering a connection. My ESC looks similer to the cheap china ones but appears to be missing the batttery configuration pads. Has anyone got any experience with this motherboard and know where I can find them?

I have attatched a general photo of the board but can get close ups if required. (Edit: Website won’t let me upload images so I have uploaded to Imgur Imgur: The magic of the Internet)

Cheers, Jack