Complex sentence: The searchlight made by the Helmore company was fitted into the nose of the Havoc behind a flat transparent screen with power for the light coming from heavy lead-acid batteries fitted in the Havoc's bomb bay.
Split into simpler sentences: The searchlight made by the Helmore company was fitted into the nose of the Havoc behind a flat transparent screen. Power for the light came from heavy lead-acid batteries fitted in the Havoc's bomb bay.