[POWER RANGERS] No clarity in who is controlling the megazord

Hi Friends,megazord fight is here to stay and it has surely improved its fights in new series power rangers super megaforce and surely to improve more in pr dino charge. But what i'am unable to understand that who is the controlling the megazord,defending the attactks. Of course we are all able to see the final attack from the megazord as all the rangers do the action. But during the battle i'm unable to understand who is controlling megazord. According to me Mystic force was quite good where anyone controlling goes a step ahead than other rangers in the megazord.