Wiring assistance.

[HighKalibre]

Hopefully some of the electrical gurus around here can give me a hand

I need some assistance building a series charging harness for my v-balancer charge through balance module.

Currently how its used:


How I'd like to charge them:


The harness I plan to modify:


The wiring:




From the pictures you can see that the harness I'll be modifying is slightly different from the wiring diagram. I imagine it has just eliminated the 6th pin.

would I need to splice pin3 into the black wire that joins the two packs in series?

excuse the quick and dirty PS wiring in the last picture, basically just trying to show the basic balance lead wiring
Thanks in advance for any help