Much of the focus in the build-up to the final against Celtic has been on the on-loan forward thanks to an impressive campaign which saw him pick up a number of end-of-season awards.
He said: "To beat Celtic, we've got to have most of our players on their game. It's really important. Leigh doesn't score goals on his own, they don't just happen. We've got to have everybody involved and contributing to the goals, whether it's attacking wise or defensive wise."
Having crashed to a 5-1 defeat to city rivals Hearts in last year's final, Fenlon is seeking a major improvement this time.
He added: "We've got to make sure everybody gets to a level of performance that befits the game as well.
"That was the disappointing thing last year, the performance. We've got to make sure we get to those levels and give ourselves every opportunity to win the game."
Fenlon believes Hibs - who have won their last three games - have shown recently they do not just have to rely on Griffiths for the goals.
He said: "I think we've had an attacking threat.
"A lot was made of 'if Leigh doesn't score then we don't score' but we have put that to bed over the last few weeks. The young boys coming into the team have been a breath of fresh air to be honest.
"They have been fantastic. They have no fear, they just want to go and play matches. It's the same in training and they have been great around the training and they have perked everybody up so it has been very good to have them in the squad."