The pad doesn't have the typical indent in the front that you find on terminator shoulder pads, it also appears to be completely uniform at the bottom, which I can't recall Indomitus terminator pads ever being. They always have the bit that goes further down in the center of the bottom rim.
Rather I find the left pad more reminiscent of a Mk VI pad, though with blade guard thickness (and without bonding studs, though it has rivets along the edge).