What switch, controller, or device fits here?
 

I am curious if anyone has found any use for this knock out? I would like to find a a dual switch that would pop into this knock out on my 2002 4Runner. https://cimg6.ibsrv.net/gimg/www.yot...54927e009.jpegWhat kind of switch, controller, or device fits in this knock-out?

That looks like it would fit the double switch bracket made by OTRATTW. They make high quality stuff. Have three of their switches in my truck.