OK seems to still match my general assumptions, I think.
The Gray Wire with White connector is in the spot that the instructions say to put it which is on the Junction side (far top left tab). It is a group of 4 tabs. The other wires I have up there are Lights for the Radio(yellow) and Lights for the Heater(Grey with Black connector). So both will dim and be ON with the light switch but no fuse there. But there is that place for a FUSE below them with one Tab below the FUSE? I guess maybe that is so you could use this whole setup for something other than intended? Instead of using it for a GRAY lights junction you could run a HOT wire to the solo tab and then use a Fuse and have 4 tabs that use a comon fuse. If it was not meant for that then they have a place for a fuse for one wire to use but it would still be dimmed. That does not make any sense.
Wait. Looking at the instructions that came with it, it seems that their GRAY wire goes to the Top Left tab (top right in instrutions as they look at it from the rear) but the connector is HORIZONAL and only shown from the back. My connectors up there are VERTICAL. So Maybe the directions were for an older version of the fuse block. It all came in the same NOS box, which has since fallen apart.
But I am thinking like you said above that my Fuse block is different than the instructions show. I should run the GRAY harness wire for this Fuse Block to the single tab at the bottom of that 5 tab cluster, on the other side of the fuse. Right to the left of where it says "vHEATER" Then put in a fuse above it and then connect my Radio light and Heater Light wires (yellow and grey) to the 4 tabs on the other side of the FUSE.
This all would have been easier to figure out if Chevy had printed a picture of the front of the Fuse Block instead of just the rear of it! Who wrote these instructions!
OK I will move my GRAY wire that comes from the light switch to the single tab below the Fuse.
That makes more sense.
Well this other version of a Fuse Junction Block
Different Fuse Block does not have a fuse for the Gray Lights just 5 tabs.
Mine locks different:
My Fuse Block So with Mine what size fuse should I use in the GRAY Lights fuse slot?