Den Bosch are in a weird situation because the Eerste Divisive playoffs are decided in more than one way.
Some teams go through their overall league position, but others can get in by winning one of the "period" tables (basically each quarter) which are basically mini-leagues.
ADO Den Haag, the team I follow over here, have already won the title so aren't eligible for the playoffs. If Den Bosch beat ADO Den Haag they could accidentally help Vitesse Arnhem finish above ADO Den Haag and Den Bosch in the fourth period table. Therefore giving Vitesse a playoff spot at the expense of themselves (Den Bosch).
If Den Bosch lose to ADO Den Haag then ADO stay ahead of Vitesse in the fourth quarter period table. And because ADO are already champions, that playoff slot gets passed down to the next team which could be Den Bosch. I'm confusing myself typing this but hopefully that makes sense.
The rules usually work quite well but this time it's created a situation where Den Bosch have this bizarre incentive to not win.