Armorsmith Archive

The hole will be your arms (left and right bicep and bracer slots), assuming you are wearing a helm, chest plate, and leggings. There is one cyber arm that acts like armor with 6000 resists across the board (the melee one), but the rest act as zero armor.

The mabari jacket covers the chest and all four arm slots (and uses the corresponding number of resources).However, you cannot wear it (or the ubese jacket) with a cyborg arm installed.

Having no armor protection in the area where you have cybernetics is the offsetting penalty to whatever benefits they provide.