There's a passing resemblance to a Jeep grille, and maybe they were found objects, but not from a Power Wheels toy. None of the ones back in the 80s (or since) ever had a grille that looked like this. They always had more and longer vertical slots (like their real-life counterparts), and the headlights were flush with the grille rather than the grille sticking out in front of them.
Yeah, it looks like they took a grille box and mated it to a base with two large circles that lights were put on. The Bajoran fighter looks like the prop was installed with the bottom visible (the box is recessed instead of sticking out.)