I tried that cable "hiekkis" mentioned to connect thumb throttle to max drive. No dice. Connector is different to controllers end.
Next i will try bafang ultra drive eb-bus cable.
I have a 48v version max drive 350w with 17A controller. Runs great 100% keep current ja current decay 8.
Fat bike frame slowers down top speeds, but tops out at ~42km/h with clown pedalin on flat