The Swedish side travel to FC Twente with both teams playing for pride as they cannot progress to the knockout stages.
Twente are one place and three points better off than their opponents, whose only point to date came from a 2-2 draw against the Dutch side in October.
However, Helsingborg captain Par Hansson believes they owe it to Hareide, who will be replaced by Roar Hansen in the new year, and the fans to give a good account of themselves.
"It's important to finish well," he told Helsingborgs Dagblad.
"We are playing for the club's image and there is also money involved. For us, it's big money. Therefore we will throw everything at them and see how long it lasts.
"Even though a lot is going to change next season, it's important to go into the new campaign with something positive.
"We also want to make a point in the Europa League, where we've played well but without getting anything in return.
"We're going to meet a really good team but we know what we can do.
"Our time with Aage has been educational. He arrived at a time when a lot of players were coming and going and a lot was happening at the club. It hasn't been easy for him but he's handled it well."
Twente are also without a win in the group and will be looking to add to the four draws they have registered so far.
Coach Steve McClaren has doubts over Nikolay Mihaylov and Jerson Cabral, while Rasmus Bengtsson may play with a protective mask after breaking his nose in last weekend's victory over ADO Den Haag, which kept them at the top of the Eredivisie.
Nacer Chadli and Denny Landzaat have also returned to training following recent injuries and may be given a run-out.