Bus bar electrical interconnection system adapted for use with an irregularly-shaped eye-shield and adapted for interconnection with leads from a battery to power a heating element affixed to the eye-shield, the interconnection system having bus bars, each bus bar adapted for connection with a lead from the battery, one or more of the bus bars having at least one protruding configuration alteration providing a partial contact surface area of the bus bars, and at least one peripheral member securing interconnection of the partial contact surface area of the bus bars with the heating element, for providing customized heating of the heating element depending upon the number of protruding configuration alterations for customized heating to prevent fogging of the eye-shield.