8 player room

Hello,

Im trying to mod the player slots on a co-op room using CE

For so far ive found the adress. I can change it to 2/3 player slots (that is not usefull becuase you cant start with that amount)
it it wont change above value 4 (only visualy and when you try to create the room it says, Failed to create)
So i guess they set a maxium player value wich is 4.

my question: how can i find the adress that blocks all values above 4 ?