Dry Sump Pan Help

Hi. In viewing this picture of Jerry B's of the dry sump pan I see the tube going all the way through. Is the bottom of the tube cut out for the oil pick up to be pulled to the pump or what. I am fabricating my own pan and need to know what is common practice. Is there just a hole in the side of the pan with the tube welded in it which goes to the pump? Thanks for any help. Graham.