Charging/balancer cable for transmitter lipo

[brown4s]

Please, I really need some advice as this problem is starting to frustrate me.

I want to buy a lipo battery for a Sanwa exzes x and will be buying either the:

- VOLTZ 2300MAH 2S 7.4V RX LIPO STRAIGHT BATTERY PACK

Or

- REEDY 1600MAH 2S 7.4V LIPO RX BATTERY

My problem is I thought I would be able to find a charging harness that had the correct battery lipo connection and balance connecter but I can’t.

Please can someone advise what I need as I am getting totally confused.

Cheers