https://www.amazon.com/Equalizer-Battery-Balancer-Capacitors-Continuous/dp/B07SFCY36G?th=1
https://images-na.ssl-images-amazon.com/images/I/61S1hUfGmWL._AC_SL1124_.jpg
I appreciate your effort. I’ve already seen this stuff.
If you know about electronics you can see there is:
Nothing in those images show a relay or relay control signal.
Just like most of the chicom crap, original docs are in chinese and never make it to English.