I worked on the High Voltage Devices team during my internship at Tesla. I performed motor cycle testing and designed the A prototype of the Cybertruck's Down-Pull-Down-Throw (DPDT) device in Catia.
This device allows the Cybertruck to switch between driving at 800V and charging at 400V. See the video on the left (starting at 47:21) for an explanation of the device and its role in the Cybertruck battery architecture.