The duo both played in the great Pontypridd side that completed the double-double back in 2014 and are seeking to repeat that feat with the Ironmen this afternoon.
Loosehead prop Howe first played at Principality Stadium with Merthyr Youth before spreading his wings and playing senior rugby at Sardis Road and for a season at Bargoed.
Second row Locke started at Pontypridd before heading to The Wern.
This weekend will be Howe’s fifth visit to the home of Welsh rugby while Locke is hoping to pick up his fifth winners’ medal from his seventh final appearance.
Their experience in the Merthyr front five will be crucial on as they bid to down regional rivals Cardiff.
“It is 1-1 this season between us and Cardiff and it would be good to get one over on them. I was at Pontypridd when we did the double-double back in 2014 and I know just how much everyone wants to knock you off your perch,” said Howe.
“A cup final at Principality Stadium is something special and great for Welsh rugby. It is a cracking occasion for the players, coaches and families.
“But you have to make sure you remember it is just one game and you must not let the occasion get to you.”
Last season Howe was able to relax and savour the big match atmosphere because he was confined to the stands because of a serious anterior cruciate knee ligament injury that kept him out from November onwards.
This year he is back for more and is hoping to make up for missing out on convincing the 2018 cup final win over Newport.
“I was injured last year and so I was lucky enough to be able to take it all in. When you are playing you aren’t quite able to do that because it just goes so fast,” added Howe.
“It will be my fifth time at the Principality Stadium and it would be great to take the Cup back to Merthyr.”
To buy tickets to WRU National Finals Day, click here.
