[greggold]

Yes, that's the same receiver I use.

It's a common ground with the battery so you only need a single wire to the sense pin. I use a jst-xh terminal to connect to the battery balance connector.

I bought a pack of 10 jst connector pairs (male and female) with wires already soldered on, for $0.02 shipped to my house from AliExpress 😆 (plus $0.28 GST, so $0.30 all up)

I'm thinking out loud about the above. So for pin set 7 on rx, the JR plug with 3 wires keeps its white (signal wire), and red (+) wire, and I cut off the black (-) wire.

For a 3S lipo, there are 4 balance plug wires, including a black ground wire which I will not connect, and a red wire, separated from the black by 2 wires at the balance plug.
Turnigy: beside the red there is blue, then yellow, then black
Zippy:  beside the red there is yellow, then white, then black
Dualsky: beside the red there is blue, then blue, then black

I expect I will connect the red JR wire to the red balance wire, and then the white signal JR wire has 2 options (connect to the balance lead next to the red, OR the balance lead next to the black.  
 
What do you suggest?