I can’t seem to find the c- terminal
That question can be answered by a wiring schematic of your bms.
1 Like
I bought the battery online but they didn’t add the charging cable to the BMS…
Yeah again, find a wiring diagram of your bms. Get on Google, search the type of bms you have and find a wiring diagram showing where everything connects. Its not that hard and you’ll have an answer before anyone responds here.
1 Like
But I don’t know the brand. And I don’t want to take any risks since it is glued to the battery itself 
Where did you get the battery
Bought it on Alibaba
link?
Problem is I had it costumized
BMS should have a brand or model.number on it somewhere try to find it and then Google.
generally P- is charge / load negative, B- battery negative. i bet you’ll see the markings on the PCB if you take cover off…
but it’s hard to tell what’s happening with yours so please find a schematic first.
2 Likes
^^ this. Look for a p- or a c- , both usually work.
2 Likes
Thank you guys 
So I wrote to thw guy I bought the battery from and he tells me that I should attach the negative charge port wire to this wire. I find it strange since it is the main negative lead. 
And if so where do I attach the red charging cable?
Your BMS uses low side sswitching so all high side wires are common. I.E. all positive voltage are connected together.
^^^ This
Basically the red wires don’t go to the bms. The positive charge port goes straight to the battery
1 Like