Radio wire color for 1969 elco

I would like to know what color the radio wire is coming from the fuse block. I read the post from Coppertop explaining that the red wire goes to the acc post, and the yellow goes to batt, but couldn't and shouldn't I connect the red to the wire coming from the fuse block? There is a fuse in the block for "radio". I would just like to have this used as intended.

Thanks