High voltage terminal blocks with an integrated high voltage interlock components. A vehicle, including the high voltage (HV) energy storage system (ESS), with HVIL source and the HV return (SR) pin and the HV socket device, the components of the HV cable and the HV terminals. The terminal assembly includes a bracket part and for the alignment of the HV cable HV socket retainer. HVIL jumper device connected to the bracket part and can be electrically connected to the HVILSR pin. Terminal components include removable mounted to the bracket part to provide the appropriate EMF shielding and weatherproof seal the lid part. The lid section includes HVIL short-circuit plug. Only in these three HVIL components, namely HVIL? SR pin HVIL jumper device HVIL short-circuit plug each other electrically connected to form closed HVIL circuit, and the HV cable is properly connected, from the ESS HV electrical energy supply to the HV devices.