Morocco actually called Heatwave a Donut.
The other weird scientists from 1945 literally did an x-ray, and obviously, they found a literally hole within Heatwave due to the fact that Heatwave simply had no parts there. In the long run, Morocco randomly said, "why is this bot a holed donut?" To the others.
The bots have no idea what a donut was, and found themselves very confused as they continued to remain on that magnetic wall they all hated much. By the time they were freed thanks to Optimus and Bumblebee, Heatwave did ask the two if by chance they knew what a donut was.
Luckily, Cody and Frankie provided an answer, whixh then left all the bots confused how any of them could be called donuts and would more likely have to xontinue the discussion once they returned to the correct time.