You'd always wondered how Shockwave refueled- he didn't have an intake, just a bright, judgemental optic. When he did refuel, he always did it in private.

Today, you finally built up the courage to ask him.

—

You walked up to Shockwave, shifting your weight from pede to pede as you stopped next to where he was currently working.

"What." The mech demanded, not looking up from what he was doing, though his finials twitched in acknowledgment of your presence.

"I was... wondering something." You began, now a bit uncertain. "...How do you refuel?" You eventually managed.

Finally, his helm turned towards you. That giant, glowing red optic narrowed, then it relaxed. "I suppose it is... logical for you to know."

With that, he did something you weren't really expecting.

He opened up his midsection panel- where his fuel tanks would be- and opened them. They were practically nothing, only a few droplets of his previous refuel remained. He then picked up a nearby energon cube with his singular servo and tipped its contents evenly into his fuel tanks.

Then he put the now-empty cube down and closed his fuel tanks, then the panel on his midsection.

"Satisfied?" Shockwave grumbled, his finials twitching with a more irritated air now.

You were speechless.