Take into account that the HydraBus is really an immensely able Resource, and combining it with an USB isolator enhances safety, reliability, and accuracy in many eventualities. 1x GND 3V3 (P2 with 2 pins 2.54mm) connector can be used to power externally the WCH CH569 MCU (it is usually recommended https://eu-pentestlab.co/en/