Armor of Darkness

This armor plate is thick and oversized compared to the rest of the golem's defenses. A quick examination of the golem's corpse reveals that this heavier plate seems to have been bolted on as an afterthought or a crude upgrade.$B$BWhy would the iron dwarves have added this redundant and mismatched armor to their war golems?$B$BPerhaps Bruor Ironbane would know if he had the chance to examine several of these plates from stormforged war golems.