Nakajima 'Kate' colour conundrum

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So here’s a somewhat esoteric trivia question… I’m building the Airfix 1/72 Nakajima ‘Kate’, and stage 28 of the instructions suggests trimming off two little protruding triangles of plastic from the top of the wing if modelling the aircraft with wheels up, so presumably they are wheels down indicators… and my model will be wheels down. So the question is, what colour should they be – I’m painting the model in IJN Black Green if that makes any difference. I can’t find any reference pictures, and there’s nothing on the colour guide. But I bet someone knows….