"If there is message to take from the game, it is one that we sent to ourselves," said Harinordoquy, after his side ran out 14-9 winners for a maiden success on the road this season.
"We showed we could play for each other and with each other. And we proved to ourselves that, with that state of mind, we can expect other wins.
"There was a true, real joy at the end of the game because we didn't expect to come away with a win. We fought until the last second - it has been a while since we finished a game as tired as we were on Saturday. There were a lot of smiles on the bus!"
Biarritz remain rooted to the bottom of the Top 14 table but they are now just five points adrift of 13th-placed Oyonnax after they backed up their shock home win over Racing Metro with another surprise at ninth-placed Brive.
They face a crucial domestic clash with Bordeaux-Begles at the next weekend at the Stade Aguilera when another positive result could seem them move to within a single win of their visitors at the halfway mark of the season.
A third straight win would also see them return to Amlin Challenge Cup competition in high spirits for December's double header with Worcester Warriors. If Biarritz can come away from those European encounters with another set of back-to-back victories, their hopes of regaining their 2012 tournament crown would be very much alive ahead of the final two rounds of action in January.
Biarritz began their Amlin Challenge Cup quest with defeat at Pool 1 leaders Sale Sharks before bouncing back with a bonus-point win over Oyonnax. They currently sit four points adrift of the Sharks prior to the December 5 trip to Worcester but the fact that they host Sale on French soil in the final round of action means they certainly won't have given up hope of regaining the trophy they won against Toulon at the Twickenham Stoop two seasons ago.