This is a strange thing. While relocating my main slide controller because access to it was not possible with out removing the basement wall. I found an unused controller in the same location.
They had mounted the controller before installing the wet bay cabinet and was inaccessible because the wet bay was blocked the access.
I manage to get it removed with one of those little right angle screw drivers and a lot of talking to it.
I mounted it next to the recently relocated controller so I guess if have a spare.
I had forgotten all about it until this topic began.