How do you change the voltage to 10s on this esc? https://m.banggood.com/Electric-Skateboard-Longboard-Controller-With-Remote-Dual-Motors-ESC-Substitute-p-1202299.html?rmmds=search
I think there is a little connection thing that you have to solder to change the voltage.
the solution is in the comments if you follow your link. Looks like only 6S or 7S is possible.