The Maori, who scored 12 tries and ran up 74 points in beating the United States on Wednesday, finished top of the competition's Pool B with a 27-6 victory over Ireland 'A' at Santa Clara Stadium in San Francisco on Saturday.
Scotland topped Pool 'A' after hard-fought wins over England Saxons and Canada.
The England Saxons will face the Irish in the Plate Final and the two host nations, Canada and the USA, will contest the Bowl Final.