Big Battery's A123 adapter

[Skull_Leader]

So, I ordered this Battery kit from Big Battery.

24V A123 LFP Battery – FREE SHIPPING! – BigBattery.com

bigbattery.com

It was a version that came with a BMS, and a wiring harness adapter, which makes it so soldering isn't needed.
I'm trying to put it all together, but the adapter will plug in both ways, and I think I'd prefer not to burn my shed down hooking it up the wrong way...

Could you awesome people help me figure this out?

 

[Delmar]

Typically the colored (red) wire should go to the main negative terminal. But doublecheck the BMS instructions.

Then use your meter to confirm which A123 connector end is main negative.

 

[Skull_Leader]

24V – A123 LiFePO4 Battery Box – BigBattery.com

bigbattery.com

I asked Big Battery, and this is what they sent me. Posted here just in case others run into the same problem