Before attacking, Jake wondered where he would hide if he had the chance to fight inside a gigantic robot. Considering that the enemy could have magic circuits where the liquid mana passed through before being used, it couldn't be in a random place. It also had been the safest and hardest to destroy… the torso was that part, but were in the torso?
Jake found his answer when he recalled the ordinary iron golems. Their interior was empty, but only the middle of their torso had enough room for someone to fit in there; he assumed that they were prototypes of the final armor…