Hummmmmmmmmmmmmmmm.
They will usually give you an ice chest for free, if they charged you for a refrigerator than you got ripped!
I am not really familiar with the 292 Islander other than the pictures I have seen of it.
If there is a switch on the panel, then it must be an option. Worse case, it you have already paid for it, then it should be easy to install and wire up.
Keep us posted.