The Cottagers need west London neighbours Chelsea to beat Aston Villa tomorrow before their Barclays Premier League safety is mathematically assured.
Whatever the outcome of the match at Villa Park, Jol wants his side to complete the season - fixtures with Liverpool, on Sunday, and Swansea - on a high.
"It was early April that we had 40 points; we had that point against Aston Villa [on April 13]," Jol said.
"I knew it was very important to be on 40 points, when you saw the schedule ahead of us with Chelsea and Arsenal, Newcastle, away games, Everton.
"Of course, you can imagine we were a bit concerned, but the 40 points gave us a bit of a cushion.
"It still is a little bit of a cushion, but mathematically we're still not safe yet.
"We will focus on ourselves to try to get a result to be safe.
"The Wigan result helped and of course we need a result, but you depend on other games as well.
"We will look at other results and even when the results are going for us we have to try to finish the season on a very good note."