Generate a question about the following movie plot: Two robots, Hero #1 (Peter Hurteau) and Hero #2 (Michael Reich) drive through a small mid-American town populated by similar robots. Hero #1 and Hero #2 arrive at a laboratory and are given latex human-like faces with prosthetic features. Hero #1 and Hero #2 return to the town, but are chased out by the robotic locals, and their faces melt off in the intense heat. Hero #1 and Hero #2 escape on foot across the desert. After a long period of travelling Hero #1 reveals a panel on his back and asks Hero #2 to activate it. Hero #1 explodes, leaving Hero #2 alone in the desert. After more travelling, Hero #2 takes his helmet off to reveal a circuit board face. Hero #2 then smashes his helmet, and uses a shard of glass to focus the light from the sun onto his hand, which combusts, the fire eventually engulfing him.
Answer:
Where is Hero one's panel ?