A high voltage (HV) header assembly includes an outer housing having a right angle body including a first segment and a second segment oriented perpendicularly to the first segment. The first segment has a mating interface at a distal end for mating with a plug assembly. The second segment has a mounting flange at a distal end for mounting to a device. The second segment extends from the first segment such that the mounting flange is oriented perpendicularly to the mating interface. The body defines a right angle chamber extending through the first and second segments between the mating interface and the mounting flange. The chamber has first and second openings therethrough in the first and second segments, respectively. HV contacts are received in the chamber of the outer housing and are configured to electrically connect to plug contacts of the plug assembly.