Oil galley plug question

FABO'ers:

Working on my 340 build this evening, finally. Just when I think I understand the oil system/flow path, I see something I don't understand. On the front of the block, near the end of the passenger-side oil galley, is an oil passage that goes down to the number 1 main. The small cup plug that goes into the oil galley is going to at least partially block this oil passage. Is it supposed to do that?

Thanks.

Edit: I'm not tubing the oil galley.