When the Commando Mages entered the room, they noticed that this was a Cleaning Room that had been equipped to handle all kinds of various situations. There was even a cupboard of manuals right in the corner of the room that provided the necessary information for such cleaning procedures.
And the one they had been looking for - cleaning dead bodies, as well as splattered guts and blood, was tucked right at the centre of the cupboard, making it look as if this was an important and essential topic they had to study or was made access to so that they could use it when the situation demands it.
Naturally, it provided much relief to the entire group since they had no idea how to clean things as it is and the manual detailed where all the items were kept. If anything, the person who created this was no doubt an obsessive compulsive person who kept the information where it needed it to be.