What size fuse goes in the inline fuse capsule for rear window defroster. I know you plug it one half into the accessory spot but then there is another adapter on the factory wiring harness for something to also plus into it. What normally plugs into that spot? I am sure I have not explained this very well. In other words you can plug something else into the wiring harness that will work off the same accessory spot in the fuse block.