Carmarthen Quins secured a late victory over Pontypool RFC at Carmarthen Park on Saturday 18 April ensuring a place in the quarter-finals.
With a 25-21 victory the Quins will now head to Cardiff Arms Park on Saturday 25 April to take on table-toppers Cardiff.
Tries were scored by Iori Basham, Gabe McDonald and Jac Howells.
