Can't find rear defrost fuse on 2010 Prius

My rear defrost all the sudden has no power going to it, but the rear defrost button illuminates as if it is working when I press it. I checked the wires which have no power flowing through them and the connections appear fine so my next task is to locate the fuse. I've looked in the fuse box underneath the steering wheel as well as the fuse box underneath the hood; I've even taken apart the dashboard and still can't locate the fuse. Where the heck is it?

 

Thanks for your response Rjparker. I checked the 3 fuses which all seemed to be fine but replaced them regardless and the the rear defog still has no power running to it. As far as the fusible link goes I'm having a little trouble finding it as well as any info to where it might be on my 2010 Prius. Ive read that it is in the engine fuse panel but that's as far as I got, here is a picture of what I'm looking at