A fixing element may include a pin connecting surface configured to conductively contact a pin of a busbar, and a detent configured to latch with the pin. The detent may be disposed above the pin connecting surface and bent in a first direction perpendicular to a longitudinal axis of the fixing element. The fixing element may also include a tab separated from the detent along the longitudinal axis of the fixing element, and a board connecting surface joined to the tab. The board connecting surface may be bent in a second direction perpendicular to the longitudinal axis of the fixing element. The second direction may be opposite to the first direction.