Black pine candle orientation

Does anyone have a reference to Ryan saying that black pines, or any pine, in development should have their candle tips oriented upwards?

Online someone is saying Ryan recommends candle tips be oriented horizontally as it encourages back buds. I think it’s the branch being horizontal and tips being up that encourages back budding and minimum photosynthesis.

I’m pretty sure they are wrong, but I can’t find a video reference.