ODrive Pro has no lights when powered through CANBus

I have applied 12V into the four pin CAN connector and I do not have any lights turn on. No power supply is connected to V- and V+ . Is this the expected behavior?

ODrive powers up fine via USB or when voltage is applied to V+/V-

Where is this 12V referenced from, are you also connected to CAN_GND?
Is CAN_GND connected to DC-? (system star point)