odd crossover ports in early dual plane holley?

I think it came like this. It appears to be in the casting. No grinding is evident.
It goes nowhere upon investigation. Just filled it with water. it appears to share a wall with the heat crossover, but it is not through to it.

I have more pics on my phone, but this site works absolutly terrible on my phone. I will have to upload them tomorrow from a pc.

So...this is a single plane because the runners aren't staggered? I assumed It was dual because its split in 2?

Thanks guys