Where’s the fuse for the stereo?

I’m trying to locate the fuse for the stereo in my Mk1 Eunos.
I can’t seem to find in which fuse box it should be in. The one under the bonnet seems fine as does the one under the steering wheel. Is there anymore hidden away elsewhere?

Possibly plugged in the back of the radio itself or an inline fuse behind the radio in the loom.

I had a look and your right, there is a fuse in the rear of the stereo but, the fuse is good.