Replacing BMS on Koowheel battery

Need some help replacing the BMS on my Koowheel battery. The original BMS doesn’t have a C- charge negative connection but the replacement BMS I bought for it does. I put together a schematic of the original and the new BMS. Wondering what I do with the C- connection as the battery port just connects to the ESC (and charging port is also on the ESC). Thx!